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10:14
Discriminant of Quadratic Equations

558 views / 0 likes - added 9 years ago

Discriminant of Quadratic Equations More free lessons at: http://www.khanacademy.org/video?v=JBSDQLZtjFo
06:47 Popular
Introduction: Crash Course U.S. Government and Politics

807 views / 0 likes - added 9 years ago

In which Craig Benzine introduces a brand new Crash Course about U.S. Government and Politics! This course will provide you with an overview of how the government of the United States is supposed to function, and we'll get into how it actually does functi
09:05 Popular
The Bicameral Congress: Crash Course Government and Politics #2

702 views / 0 likes - added 9 years ago

In which Craig Benzine teaches you about the United States Congress, and why it's bicameral, and what bicameral means. Craig tells you what the Senate and House of Representatives are for, some of the history of the institutions, and reveal to you just ho
08:31 Popular
Separation of Powers and Checks and Balances: Crash Course Government and Politics #3

1,690 views / 2 likes - added 9 years ago

In which Craig Benzine teaches you about the US Governments Separation of powers and the system of checks and balances. In theory, the Legislative Branch, the Executive Branch, and the Judicial Brach are designed to keep each other in check, and to keep a
09:15
Federalism: Crash Course Government and Politics #4

693 views / 0 likes - added 9 years ago

In which Craig Benzine teaches you about federalism, or the idea that in the United States, power is divided between the national government and the 50 state governments. Craig will teach you about how federalism has evolved over the history of the US, an
08:57 Popular
Constitutional Compromises: Crash Course Government and Politics #5

792 views / 1 likes - added 9 years ago

In which Craig Benzine teaches you about the compromises met in ratifying the U.S. Constitution. The United State’s didn’t always have its current system of government. Actually, this is it’s second attempt. Craig will delve into the failures (and few suc
08:58
Congressional Elections: Crash Course Government and Politics #6

668 views / 0 likes - added 9 years ago

This week Craig Benzine talks about the importance of elections. But he isn’t going to focus on presidential elections, but instead those of the strongest part of our government: congressional elections. Craig will talk about the frequency of elections in
08:28
Congressional Committees: Crash Course Government and Politics #7

697 views / 0 likes - added 9 years ago

This week Craig Benzine clears up the role of committees in Congress. We’ll talk about standing committees, joint committees, conference committees, and caucuses (and not the candidate-choosing kinds) as well as the staff agencies that help advise these c
08:12
Congressional Leadership: Crash Course Government and Politics #8

649 views / 0 likes - added 9 years ago

This week Craig Benzine explores the leadership structure of congress. We’ll break out the clone machine to examine the responsibilities of the speaker of the house, the majority and minority leaders as well as the majority and minority whips in both the
12:12 Popular
Introduction to Astronomy: Crash Course Astronomy #1

720 views / 3 likes - added 9 years ago

Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?" -- Table of Contents: What is Astronomy? 3:00 Who Studie
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Naked Eye Observations: Crash Course Astronomy #2

668 views / 0 likes - added 9 years ago

Today on Crash Course Astronomy, Phil invites you to head outside and take a look at all the incredible things you can see with your naked eye. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of the
09:29
Cycles in the Sky: Crash Course Astronomy #3

627 views / 0 likes - added 9 years ago

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of
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Moon Phases: Crash Course Astronomy #4

1,955 views / 6 likes - added 9 years ago

In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases. -- Why the Moon Has Phases 0:36.1 Spheres in Orbit 1:05.4 Name of the Moon Phases 2:25.5 How We See It 7:48.2 -- PBS Digital Studios: http://youtube
10:32 Popular
Eclipses: Crash Course Astronomy #5

835 views / 0 likes - added 9 years ago

The big question in the comments last week was, "BUT WHAT ABOUT ECLIPSES?" Today, Phil breaks 'em down for you. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse -- As promised, Phil's sun spotting recommendations: Astronome
12:01
Telescopes: Crash Course Astronomy #6

669 views / 0 likes - added 9 years ago

Today Phil explains how telescopes work and offers up some astronomical shopping advice. -- How Telescopes Work 1:07 Refractors vs Reflectors 2:50 Technology and the Light Spectrum 7:45 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow P
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The Gravity of the Situation: Crash Course Astronomy #7

761 views / 0 likes - added 9 years ago

In today's episode, Phil looks at how gravity plays out across the universe. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse -- Gravity is a Force 2:17 Different Types of Orbit 3:41 Escape Velocity 5:30 Weightless Mass 7:0
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Tides: Crash Course Astronomy #8

1,089 views / 1 likes - added 9 years ago

Today Phil explores the world of tides! What is the relationship between tides and gravity? How do planets and their moons become tidally locked? What would happen if you were 300km tall? Important questions. -- Gravity Over Distance 0:44 Tidal Force Para
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Introduction to the Solar System: Crash Course Astronomy #9

981 views / 1 likes - added 9 years ago

In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today. This episode is sponsored by Squaresp
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The Sun: Crash Course Astronomy #10

797 views / 2 likes - added 9 years ago

Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our planet. This epis
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The Earth: Crash Course Astronomy #11

883 views / 0 likes - added 9 years ago

Phil starts the planet-by-planet tour of the solar system right here at home, Earth. -- Table of Contents Earth is a Planet 0:03 Layers of Earth 1:25 The Magnetic Field 5:10 Atmosphere and the Human Influence 6:14 -- PBS Digital Studios: http://youtube.co
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The Moon: Astronomy #12

957 views / 1 likes - added 9 years ago

Join Phil for a tour of our capital-M Moon, from surface features, inside to the core, and back in time to theories about its formation. This episode is brought to you by Squarespace: http://www.squarespace.com/crashcourse -- Table of Contents Many Millio
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Mercury: Crash Course Astronomy #13

1,284 views / 9 likes - added 9 years ago

Mercury is the closest planet to the sun. It has no atmosphere and is, as such, covered in craters. It's also incredibly hot but, surprisingly, has water ice hiding beneath its surface. -- Table of Contents Closest Planet to the Sun 0:03 Rotation Locked t
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07:24
Superbugs: The Empire Strikes Bacteria

684 views / 0 likes - added 9 years ago

Check out GROSS SCIENCE: http://bit.ly/1DH5zbv Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart↓ More info and sources below ↓ Are we entering the post-antibiotic era? Antibiotic-resistant bacteria are on the rise, with millions of infections re
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07:05
The Recipe For Life…

607 views / 0 likes - added 9 years ago

We're cookin' in the primordial kitchen! Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart↓ More info and sources below ↓ If the human body could be distilled down into one molecule, what would our chemical formula be? And WHY is it that way? Is
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05:06 Popular
%$?# Allergies!

899 views / 0 likes - added 9 years ago

It’s the season for sneezin’! Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Springtime means the arrival of green grass, bright flowers, and buzzing bees. But for many of us, it’s also about sneezing, watery re
04:01 Popular
How Many Stars Are There?

1,011 views / 2 likes - added 9 years ago

Counting stars from the shore of the cosmic ocean… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ LIKE THE SHIRT I'M WEARING? It's glow in the dark! You can get it here (along with space undies and other good st
03:12 Popular
What Color Is The Universe?

1,599 views / 2 likes - added 9 years ago

Hint: It’s not black Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ When you stare up at the night sky, you might think that the universe is really black, but that’s just because our eyes aren’t sensitive enough
06:35 Popular
Attack Of The Zombie Parasites!

827 views / 3 likes - added 9 years ago

Did someone say BRAAAAAINS…? Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Shows like The Walking Dead are full of hungry, mindless, surprisingly fleet-footed armies of brain-eating zombies. Could they actually
04:47 Popular
Why Does February Only Have 28 Days?

945 views / 4 likes - added 9 years ago

It's not the size of the month that matters… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Why does February only get 28 days when all the other months get 30 or 31? The answer is part superstition, part politi
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07:23 Popular
Why Vaccines Work

911 views / 1 likes - added 9 years ago

A dose of reality about vaccines… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ As more and more parents are choosing not to vaccinate their children or are vaccinating them later, diseases like measles are mak
04:46 Popular
How Many Heartbeats Do We Get?

1,411 views / 0 likes - added 9 years ago

Science really gets my heart going… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart
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04:05
What Is Déjà Vu?!

539 views / 0 likes - added 9 years ago

I feel like I’ve seen this video before… Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobe
05:13 Popular
5 Weird Involuntary Behaviors Explained!

764 views / 0 likes - added 9 years ago

Yawns, hiccups, twitchy eyes (and more) explained! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on In
05:02 Popular
There's No Such Thing As Cold

749 views / 1 likes - added 9 years ago

If cold isn’t real, then how can I feel it? Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram
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04:34 Popular
How Many Smells Can You Smell?

814 views / 0 likes - added 9 years ago

How do we smell? Great! Thanks for asking! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram:
06:34 Popular
Does My Dog Know What I'm Thinking?

860 views / 0 likes - added 9 years ago

Head to BrainCraft for more doggy science! http://youtu.be/OBy3idLwwYM Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesm
07:34 Popular
Why People Don't Believe In Climate Science

795 views / 0 likes - added 9 years ago

Watch Part 1:“The Facts” http://youtu.be/ffjIyms1BX4 Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on
06:20
Climate Science: What You Need To Know

647 views / 1 likes - added 9 years ago

Learn the basic science of climate change in 24 easy steps Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Foll
04:32 Popular
Where Do Birds Go In Winter?

897 views / 1 likes - added 9 years ago

And where do they keep their suitcases? Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: ht
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09:12 Popular
The Sixth Extinction

804 views / 2 likes - added 9 years ago

This time, we’re the asteroid. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://inst
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05:31
Why Are Some People Left-Handed?

680 views / 0 likes - added 9 years ago

The science of their sinister ways… Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http:/
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03:42
How To See Time Travel!!!

582 views / 1 likes - added 9 years ago

Behold the COSMOTRON 5000!!! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instag
04:52 Popular
Why Does The Earth Have Layers?

1,258 views / 3 likes - added 9 years ago

…or why we live on an onion made of magma. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram:
06:29 Popular
Why Do Clouds Stay Up?

975 views / 2 likes - added 9 years ago

There’s nothing wrong with having your head in the clouds. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Foll
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03:59 Popular
A Slice Of Pizza Science!

1,167 views / 1 likes - added 9 years ago

How does math keep a folded slice from drooping? And what does pizza have to do with the speed of light?↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com How a 19th Century
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05:21 Popular
Bats: Guardians Of The Night

957 views / 9 likes - added 9 years ago

To see all the great bat action, please watch in HD!! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Visit Bat
06:03
The Physics Of Space Battles

672 views / 0 likes - added 9 years ago

How scientifically accurate is your favorite sci-fi space battle? Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.c
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05:45 Popular
What's The Deadliest Animal In The World?

842 views / 2 likes - added 9 years ago

Besides humans, of course. Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Gates Foundation info on the world’s
03:11 Popular
Where Does The Smell Of Rain Come From?

893 views / 0 likes - added 9 years ago

I smell a science storm a-comin'!! Subscribe to It’s Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com References: “Nature of Argil
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04:51 Popular
What If There Were No Sharks?

2,050 views / 14 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Follow this link to more shark science videos by your favorite YouTubers!! http://bit.ly/1sugd0z↓ More info and sources below ↓ Follow on Twitter:
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06:10 Popular
The Oldest Living Things In The World

725 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow
02:02 Popular
The Sun Is A Magnet!

737 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Sunspots, solar flares, coronal mass ejections, OH MY! Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ F
04:46
How Your Body Knows Left From Right

649 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Why are our bodies so symmetrical, but our guts aren't?↓ More info and sources below ↓ Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub
04:14 Popular
You Are An Upside-Down Lobster

772 views / 1 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Here's why you aren't built like a lobster. Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ Follow on Tw
04:25 Popular
Why Your Brain Is In Your Head

788 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- Check out BrainCraft: http://youtu.be/aucscX191vQ Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub↓ More info and sources below ↓ Follow
05:54
The Delicious Science Of CHEESE!

557 views / 0 likes - added 9 years ago

Vote PBS Digital Studios for 'Best Science&Education Network' in the 2015 Webbys -- http://vid.io/xqjk ---- There's science in cheese? You'd cheddar believe it. Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub Follow on Twitter: http://twitter.
10:50 Popular
Venus: Crash Course Astronomy #14

1,116 views / 5 likes - added 9 years ago

Venus is a gorgeous naked-eye planet, hanging like a diamond in the twilight -- but it’s beauty is best looked at from afar. Even though Mercury is closer to the sun, Venus is the hottest planet in the solar system, due to a runaway greenhouse effect, and
08:23 Popular
Is Ultron Inevitable?

821 views / 0 likes - added 9 years ago

Follow me to Vsauce3!! http://bit.ly/1zUxn7a Twitter: @okaytobesmart @jtotheizzoe Instagram: @jtotheizzoe↓ More info and sources below ↓ Will artificial intelligence ever surpass human intelligence? And if that happens, will AI be good or bad? Is evil AI
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Mars: Crash Course Astronomy #15

883 views / 3 likes - added 9 years ago

The fourth planet from the sun and the outermost of the terrestrial planets, Mars has long been a popular spot for missions and imagination. Phil walks you through the planet's topography, core, and features. We'll take a look back to Mars's past and make
06:12 Popular
Could We Clone Ourselves?

1,000 views / 0 likes - added 9 years ago

Just be yourself! Or be your other self. Whichever. Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ Is the science of Orphan Black realistic? Could we clone humans, or engineer them to have customized traits? We
10:44 Popular
Jupiter: Crash Course Astronomy #16

1,288 views / 5 likes - added 9 years ago

Jupiter is the biggest planet in our solar system. The gas giant is NOT a failed star, but a really successful planet! It has a dynamic atmosphere with belts and zones, as well as an enormous red spot that’s actually a persistent hurricane. Jupiter is sti
04:08 Popular
What's The Loudest Possible Sound?

1,149 views / 2 likes - added 8 years ago

It’s definitely higher than “11” Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ What is the loudest possible sound? What about the quietest thing we can hear? And what do decibels measure, anyway? In this video
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Jupiter's Moons: Crash Course Astronomy #17

807 views / 1 likes - added 8 years ago

Before moving on from Jupiter to Saturn, we’re going to linger for a moment on Jupiter’s moons. There are 67 known moons, and 4 huge ones that we want to explore in greater detail. Ganymede is the largest - larger, in fact, than any other moon in the sola
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Saturn: Crash Course Astronomy #18

1,041 views / 6 likes - added 8 years ago

Saturn is the crown jewel of the solar system, beautiful and fascinating. It is a gas giant, and has a broad set of rings made of ice particles. Moons create gaps in the rings via their gravity. Saturn has dozens of moons, including Titan, which is as big
07:25
Controlling Bureaucracies: Crash Course Government And Politics #17

641 views / 0 likes - added 8 years ago

In which Craig Benzine tells you how we keep bureaucracy in check. So we've spent the last few episodes telling you all about what bureaucracies are and why they are formed. And throughout we've hinted about this ever-expanding power within the executive
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Legal System Basics: Crash Course Government And Politics #18

1,144 views / 1 likes - added 8 years ago

This week Craig Benzine takes a first look at the judicial branch. It's pretty easy to forget that the courts, and the laws that come out of them, affect our lives on a daily basis. But how exactly these decisions are made and where each law's jurisdictio
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Uranus & Neptune: Crash Course Astronomy #19

2,245 views / 13 likes - added 8 years ago

Today we’re rounding out our planetary tour with ice giants Uranus and Neptune. Both have small rocky cores, thick mantles of ammonia, water, and methane, and atmospheres that make them look greenish and blue. Uranus has a truly weird rotation and relativ
06:59 Popular
Structure Of The Court System: Crash Course Government And Politics #19

983 views / 0 likes - added 8 years ago

This week Craig Benzine is going to talk about the structure of the U.S. court system and how exactly it manages to keep things moving smoothly. We’’ll talk about trial courts, district courts, appeals courts, circuit courts, state supreme courts, and of
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Asteroids: Crash Course Astronomy #20

722 views / 1 likes - added 8 years ago

Now that we’ve finished our tour of the planets, we’re headed back to the asteroid belt. Asteroids are chunks of rock, metal, or both that were once part of smallish planets but were destroyed after collisions. Most orbit the Sun between Mars and Jupiter,
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S.C.O.T.U.S. Procedures: Crash Course Government And Politics #20

642 views / 0 likes - added 8 years ago

This week Craig Benzine talks about what happens when a case makes it to the Supreme Court of the United States (or the SCOTUS). We're going to focus on court procedure today. We talk about how to petition to get your case heard, how written arguments, or
05:11 Popular
Will We Ever Run Out Of Oil?

764 views / 2 likes - added 8 years ago

Check out our whole series on ENERGY! http://bit.ly/1BnH5zu Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ We’ve heard news of “peak oil” and “the end of the oil age” for years now, but we keep coming up with wa
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04:18 Popular
The Surprising Places We Waste Energy

1,097 views / 0 likes - added 8 years ago

Check out our whole series on ENERGY! http://bit.ly/1BnH5zu Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ We use a LOT of energy, but we waste a lot too. Where that waste happens might surprise, you though. We
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06:31 Popular
Did Dinosaurs Really Go Extinct?

1,175 views / 0 likes - added 8 years ago

Welcome to… Jurassic Pluck Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Most people are taught that dinosaurs went extinct 66 million years ago when a giant meteor crashed into the Yucatan peninsu
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05:22 Popular
The Essentials Of Energy

891 views / 1 likes - added 8 years ago

Check out our whole series on ENERGY! http://bit.ly/1BnH5zu Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ The world of energy is a confusing place. What’s better, nuclear or solar? What’s the difference between
03:25 Popular
Does The Moon Really Orbit The Earth?

1,359 views / 2 likes - added 8 years ago

What holds the moon up? Moonbeams! Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart ↓ More info and sources below ↓ According to Newton’s law of gravitation, the sun should “pull” way harder on the moon than the Earth does. So does the moon actu
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11:55 Popular
Comets: Crash Course Astronomy #21

736 views / 0 likes - added 8 years ago

Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long tail, and also releases dust that forms a different tail. We’ve visited comets
04:21 Popular
Why Are The Bees Dying?

1,566 views / 6 likes - added 8 years ago

If bees go, will they take us with them? Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Bees, wild and domesticated, are in big trouble. Bee colonies are dying off at alarming rates, and the cause i
05:39 Popular
Which Came First - Flowers Or Bees?

840 views / 2 likes - added 8 years ago

Stop and smell the flowers… and watch this video Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Bees and flowers have an amazingly close relationship. Flowers need bees in order to reproduce, and be
08:01 Popular
Judicial Review: Crash Course Government And Politics #21

1,192 views / 0 likes - added 8 years ago

Today, Craig Benzine is going to tell you about the Supreme Court's most important case, Marbury v. Madison, and how the court granted itself the power of judicial review. Judicial review is the power to examine and invalidate actions of the legislative a
11:41
The Oort Cloud: Crash Course Astronomy #22

695 views / 0 likes - added 8 years ago

Now that we’re done with the planets, asteroid belt, and comets, we’re heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system. The Kuiper Belt i
06:01 Popular
Thomas Jefferson And The Giant Moose

1,001 views / 3 likes - added 8 years ago

E pluribus moose-um Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ America’s first great science battle wasn’t the space race or the atom bomb, it was fought between Thomas Jefferson, a French noble
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Meteors: Crash Course Astronomy #23

640 views / 2 likes - added 8 years ago

Today Phil helps keep you from ticking off an astronomer in your life by making sure you know the difference between a meteor, meteorite, and meteoroid. When the Earth plows through the stream emitted by a comet we get a meteor shower. Meteors burn up abo
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Light: Crash Course Astronomy #24

1,652 views / 0 likes - added 8 years ago

In order to understand how we study the universe, we need to talk a little bit about light. Light is a form of energy. Its wavelength tells us its energy and color. Spectroscopy allows us to analyze those colors and determine an object’s temperature, dens
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Your Salad Is Trying To Kill You

651 views / 0 likes - added 8 years ago

The dose makes the poison… Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Plants are the most important source of nutrients for pretty much all of Earth's animals, and many of the planet's bacteria
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04:29 Popular
How Does A Canyon Become Grand?

1,487 views / 8 likes - added 8 years ago

And a very Grand Canyon it is… Subscribe: http://bit.ly/iotbs_sub Twitter: @jtotheizzoe @okaytobesmart ↓ More info and sources below ↓ Thanks to Mike from PBS Idea Channel and Jamin from PBS Game/Show for hanging out at the Grand Canyon with me! https://w
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Judicial Decisions: Crash Course Government And Politics #22

652 views / 1 likes - added 8 years ago

Today, Craig Benzine is going to dive into the factors that influence judicial decisions. As you may have noticed, the Supreme Court recently handed down some pretty big decisions on same-sex marriage (in Obergefell v Hodges) and the Affordable Care Act (
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Distances: Crash Course Astronomy #25

647 views / 2 likes - added 8 years ago

How do astronomers make sense out of the vastness of space? How do they study things so far away? Today Phil talks about distances, going back to early astronomy. Ancient Greeks were able to find the size of the Earth, and from that the distance to and th
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Civil Rights & Liberties: Crash Course Government #23

704 views / 0 likes - added 8 years ago

Today, Craig is going to give you an overview of civil rights and civil liberties. Often these terms are used interchangeably, but they are actually very different. Our civil liberties, contained in the Bill of Rights, once only protected us from the fede
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Stars: Crash Course Astronomy #26

642 views / 0 likes - added 8 years ago

Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots stars’ luminosity
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Freedom Of Religion: Crash Course Government And Politics #24

747 views / 2 likes - added 8 years ago

Today, Craig is going to take a look at the First Amendment and your right to freedom of religion. We’ll examine some significant Supreme Court decisions and talk about how they’ve affected our interpretations of the law with respect to stuff like animal
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Freedom Of Speech: Crash Course Government And Politics #25

755 views / 1 likes - added 8 years ago

Today, FINALLY, Craig is going to talk about Free Speech! Now, free speech is so important because it not only allows you to critique the government, but it also protects you from the government. But it's essential to remember that not ALL speech is prote
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Exoplanets: Crash Course Astronomy #27

600 views / 1 likes - added 8 years ago

Today Phil explains that YES, there are other planets out there and astonomers have a lot of methods for detecting them. Nearly 2000 have been found so far. The most successful method is using transits, where a planet physically passes in front of its par
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Freedom Of The Press: Crash Course Government And Politics #26

789 views / 0 likes - added 8 years ago

Today, Craig is going to finish up our discussion of the First Amendment with freedom of the press. Like an individual's right to free speech, the press has a right, and arguably responsibility, to tell the public what the government is doing. But of cour
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Brown Dwarfs: Crash Course Astronomy #28

659 views / 0 likes - added 8 years ago

While Jupiter is nowhere near massive enough to initiate fusion in its core, there are even more massive objects out there that fall just short of that achievement as well called brown dwarfs. Brown dwarfs, have a mass that places them between giant plane
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Search And Seizure: Crash Course Government And Politics #27

695 views / 0 likes - added 8 years ago

This week Craig talks about police searches and seizures. Now, the fourth amendment says that you have the right to be protected against "unreasonable searches and seizures" but what exactly this mean? Well, it's complicated. The police often need warrant
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What Has New Horizons Taught Us About Pluto?

607 views / 2 likes - added 8 years ago

Pluto's not just cool… it's ICE COLD Tweet ⇒ http://bit.ly/OKTBSpluto Share on FB ⇒ http://bit.ly/OKTBSplutoFB ↓ More info and sources below ↓ Since New Horizons flew by Pluto on July 14, 2015, it’s completely redefined what we know about the dwarf planet
04:12
What Is Fire?

618 views / 0 likes - added 8 years ago

T-SHIRTS! http://dftba.com/besmart Tweet ⇒ http://bit.ly/OKTBSfire Share on FB ⇒ http://bit.ly/OKTBSfireFB ↓ More info and sources below ↓ Why does fire burn? What’s the chemistry and physics of a flame? This week, learn about the beautiful science happen
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06:31
Why Do We Laugh?

580 views / 0 likes - added 8 years ago

Several jokes were harmed in the making of this video Tweet ⇒ http://bit.ly/OKTBSlaugh Share on FB ⇒ http://bit.ly/OKTBSlaughFB ↓ More info and sources below ↓ T-SHIRTS! http://dftba.com/besmart Laughing is a universal human behavior, one that transcends
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06:33
Why Are Cicadas So Good At Math?

626 views / 0 likes - added 8 years ago

T-SHIRTS! http://dftba.com/besmart VIDCON! http://bit.ly/1DqnxeQ Follow me to Gross Science: http://youtu.be/IDBkj3DjNSM ↓ More info and sources below ↓ Do periodical cicadas “know” how to calculate prime numbers? One of the strangest life cycles in all o
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Due Process Of Law: Crash Course Government And Politics #28

728 views / 0 likes - added 8 years ago

This week Craig is going to continue our discussion of due process. Technically, we started last week with the 4th amendment and search and seizure, but this week we’re going to look at the 5th and 6th amendments and how they ensure a fair trial. We’ll ta
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Low Mass Stars: Crash Course Astronomy #29

898 views / 0 likes - added 8 years ago

Today we are talking about the life -- and death -- of stars. Low mass stars live a long time, fusing all their hydrogen into helium over a trillion years. More massive stars like the Sun live shorter lives. They fuse hydrogen into helium, and eventually
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Incredible Tails Of Amazing Whales!

784 views / 1 likes - added 8 years ago

Joe's proposed SXSW panel is "Science on YouTube: Where the Smart Kids Are". Vote for it before 9/4! http://vid.io/xqTj Whales are AMAZING! Check out #BigBlueLive: http://pbs.org/bigbluelive Tweet ⇒ http://bit.ly/OKTBSwhales Share on FB ⇒ http://bit.ly/OK
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White Dwarfs & Planetary Nebulae: Crash Course Astronomy #30

512 views / 0 likes - added 8 years ago

Today Phil follows up last week’s look at the death of low mass stars with what comes next: a white dwarf. White dwarfs are incredibly hot and dense objects roughly the size of Earth. They also can form planetary nebulae: huge, intricately detailed object
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Equal Protection: Crash Course Government And Politics #29

755 views / 1 likes - added 8 years ago

Today, Craig is going to talk about the most important part of the Constitution - the Fourteenth Amendment. In particular, we're going to discuss the "equal protection" clause and how it relates to our civil rights. So we've spent the last few episodes ta
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I Don't Think You're Ready For These Jellies

572 views / 0 likes - added 8 years ago

Check out #BigBlueLive! http://pbs.org/bigbluelive ↓ More info and sources below ↓ Jellyfish are mesmerizing and beautiful and I have no idea how they work. So I went behind the scenes at the Monterey Bay Aquarium with my new friend Tommy to learn all abo
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Cuttlefish: Tentacles In Disguise

562 views / 1 likes - added 8 years ago

Joe's proposed SXSW panel is "Science on YouTube: Where the Smart Kids Are". Vote for it before 9/4! http://vid.io/xqTj Check out #BigBlueLive! http://pbs.org/bigbluelive Tweet ⇒ http://bit.ly/OKTBScuttle Share on FB ⇒ http://bit.ly/OKTBScuttleFB ↓ More i
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The Ruin And Rise Of Monterey Bay

499 views / 0 likes - added 8 years ago

Joe's proposed SXSW panel is "Science on YouTube: Where the Smart Kids Are". Vote for it before 9/4! http://vid.io/xqTj Check out #BigBlueLive! http://pbs.org/bigbluelive Share on FB ⇒ http://bit.ly/OKTBSriseFB ↓ More info and sources below ↓ Before peopl
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A Sea Otter's Adorable Adoption Story

855 views / 5 likes - added 8 years ago

Joe's proposed SXSW panel is "Science on YouTube: Where the Smart Kids Are". Vote for it before 9/4! http://vid.io/xqTj Check out #BigBlueLive! http://pbs.org/bigbluelive Tweet ⇒ http://bit.ly/OKTBS696 Share on FB ⇒ http://bit.ly/OKTBS696FB ↓ More info an
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8 Incredible Deep Sea Oddities!

910 views / 0 likes - added 8 years ago

Joe's proposed SXSW panel is "Science on YouTube: Where the Smart Kids Are". Vote for it before 9/4! http://vid.io/xqTj Check out #BigBlueLive! http://pbs.org/bigbluelive Tweet ⇒ http://bit.ly/OKTBSdeep Share on FB ⇒ http://bit.ly/OKTBSdeepFB ↓ More info
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03:32 Popular
Why I'm Scared Of Spiders

1,212 views / 6 likes - added 8 years ago

Joe's proposed SXSW panel is "Science on YouTube: Where the Smart Kids Are". Vote for it before 9/4! http://vid.io/xqTj The science of… OH GOD IS THAT A SPIDER?! Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ F
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High Mass Stars: Crash Course Astronomy #31

964 views / 1 likes - added 8 years ago

Massive stars fuse heavier elements in their cores than lower mass stars. This leads to the creation of heavier elements up to iron. Iron robs critical energy from the core, causing it to collapse. The shock wave, together with a huge swarm of neutrinos,
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Sex Discrimination: Crash Course Government And Politics #30

735 views / 1 likes - added 8 years ago

Today, Craig is going to talk about employment discrimination, and we're going to focus primarily on women in the workforce. Discrimination against women tends to be handled somewhat differently in the courts as they are not a minority. Even so, the court
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Neutron Stars: Crash Course Astronomy #32

781 views / 1 likes - added 8 years ago

In the aftermath of a 8 – 20 solar mass star’s demise we find a weird little object known as a neutron star. Neutrons stars are incredibly dense, spin rapidly, and have very strong magnetic fields. Some of them we see as pulsars, flashing in brightness as
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Discrimination: Crash Course Government And Politics #31

682 views / 1 likes - added 8 years ago

Today, Craig is going to wrap up our discussion of discrimination by looking more closely at those “discrete and insular minorities” referenced in the 14th Amendment. We’ll talk about instances of discrimination of Asian, European, and Latino immigrants,
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Theory Vs. Hypothesis Vs. Law… Explained!

1,516 views / 0 likes - added 8 years ago

Think you know the difference? Tweet ⇒ http://bit.ly/OKTBStheory Share on FB ⇒ http://bit.ly/theoryFB ↓ More info and sources below ↓ Some people try to attack things like evolution by natural selection and man-made climate change by saying “Oh, that’s ju
08:22
Why Do We Have To Sleep?

585 views / 2 likes - added 8 years ago

…and how did it evolve in the first place? Tweet ⇒ http://bit.ly/OKTBSsleep Share on FB ⇒ http://bit.ly/OKTBSsleepFB ↓ More info and sources below ↓ Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we
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Binary And Multiple Stars: Crash Course Astronomy #34

731 views / 0 likes - added 8 years ago

Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are actually part of binary or multiple systems. If they are close enough together they can actually t
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Affirmative Action: Crash Course Government And Politics #32

676 views / 0 likes - added 8 years ago

So we've been talking about civil rights for the last few episodes now, and we're finally going to wrap this discussion up with the rather controversial topic of affirmative action. We'll explain what exactly affirmative action is, who it is for, and why
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Black Holes: Crash Course Astronomy #33

933 views / 3 likes - added 8 years ago

We’ve covered a lot of incredible stuff, but this week we’re talking about the weirdest objects in space: BLACK HOLES. Stellar mass black holes form when a very massive star dies, and its core collapses. The core has to be more than about 2.8 times the Su
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Public Opinion: Crash Course Government And Politics #33

1,196 views / 0 likes - added 8 years ago

So today, Craig is finally going to start talking about politics. Now up until this point we've specifically been looking at government - that is answering the questions of who, what, and how in relation to policies. But politics is different in that it l
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El Niño And Why We Can't Predict The Weather

948 views / 1 likes - added 8 years ago

Is your weatherman wrong? Blame El Niño. ↓ More info and sources below ↓ What is El Niño? Why can’t we predict the weather? El Niño could be to blame for your ruined weekend plans. Just a few slight changes can drastically shift the weather. Even our smar
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Star Clusters: Crash Course Astronomy #35

571 views / 0 likes - added 8 years ago

Last week we covered multiple star systems, but what if we added thousands or even millions of stars to the mix? A star cluster. There are different kinds of clusters, though. Open clusters contain hundreds or thousands of stars held together by gravity.
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Shaping Public Opinion: Crash Course Government And Politics #34

552 views / 0 likes - added 8 years ago

So today Craig is going to talk about where our political opinions come from. Of course, most people’s politics are grounded in their ideologies, but there are also other external influences such as the government itself, interest groups, and the media. S
04:09 Popular
What Color Is The Moon?

843 views / 2 likes - added 8 years ago

How the night sky tricks our brains! ↓ More info and sources below ↓ Here’s how you all described the color of the moon: https://www.facebook.com/itsokaytobesmart/photos/a.337182013046136.73328.173915612706111/801410886623244/ http://www.itsokaytobesmart.
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04:50
How We See Color

545 views / 1 likes - added 8 years ago

When you mix red and green, what do you get? White light is all of the colors, right? So, how do computer screens show you every wavelength of light? Or do they? instagram.com/thephysicsgirl facebook.com/thephysicsgirl twitter.com/thephysicsgirl physicsgi
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04:19 Popular
How 3D Holograms Work

888 views / 0 likes - added 8 years ago

Holograms are photographic recordings of 3D scenes. Unlike a camera, which captures one view through a small viewer focused by a lens, holograms capture an entire light field which allows them to recreate the 3D scene. Shimmery 2D projections, like pre-re
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Is This Really 3D?

873 views / 1 likes - added 8 years ago

3D movies and TV are is increasing in popularity, but is any of it truly 3D? How true is the 3D in movie theaters? How do glassess-less 3D TVs work? Try catching a ball with one eye closed. If you find it easy, try having the ball thrown a couple of feet
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How To Make A Cloud In Your Mouth

1,144 views / 3 likes - added 8 years ago

Learn how to make a wispy cloud come out of your mouth, even when it’s not cold out. Like any awesome trick, physics is to thank for the mouth cloud. This simple and fun demonstration can be used to explain the cloud in a bottle experiment, and real cloud
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03:41 Popular
How To Make A Hurricane On A Bubble

1,168 views / 4 likes - added 8 years ago

How do scientists mimic the physics of a hurricane on the surface of a bubble? What other types of crazy research are bubbles used for? Learn how to create colorful vortices on a bubble in your kitchen! instagram.com/thephysicsgirl facebook.com/thephysics
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Nebulae: Crash Course Astronomy #36

598 views / 2 likes - added 8 years ago

Astronomers study a lot of gorgeous things, but nebulae might be the most breathtakingly beautiful of them all. Nebulae are clouds of gas and dust in space. They can glow on their own or reflect light from nearby stars. When they glow it’s usually predomi
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Political Ideology: Crash Course Government And Politics #35

883 views / 1 likes - added 8 years ago

So today Craig is going to look at political ideology in America. We're going to focus on liberals and conservatives and talk about the influencers of both of these viewpoints. Now, it's important to remember that political ideologies don't always perfect
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How To Hit A Fastball (According To Science!!!)

608 views / 1 likes - added 8 years ago

This episode is brought to you by Dropbox https://www.dropbox.com/ Tweet this ⇒ http://bit.ly/OKTBSbase Share on FB ⇒ http://bit.ly/OKTBSbaseFB ↓ More info and sources below ↓ We’ve got t-shirts! Get yours here: http://store.dftba.com/collections/its-okay
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The Milky Way: Crash Course Astronomy #37

778 views / 0 likes - added 8 years ago

Today we’re talking about our galactic neighborhood: The Milky Way. It’s a disk galaxy, a collection of dust, gas, and hundreds of billions of stars, with the Sun located about halfway out from the center. The disk has grand spiral patterns in it, formed
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Election Basics: Crash Course Government And Politics #36

741 views / 0 likes - added 8 years ago

This week Craig is going to give you a broad overview of elections in the United States. So as you may have noticed, there are kind of a lot of people in the U.S, and holding individual issues up to a public vote doesn't seem particularly plausible. So to
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AMAZING! Ferrofluid + Glow Sticks

880 views / 1 likes - added 8 years ago

Ferrofluid is a liquid that displays unusual properties in the presence of a magnetic field. Watch what happens when we mix ferrofluid with the liquid from a glow stick! instagram.com/thephysicsgirl facebook.com/thephysicsgirl twitter.com/thephysicsgirl p
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Galaxies, Part 1: Crash Course Astronomy #38

677 views / 0 likes - added 8 years ago

The Milky Way is our neighborhood in the universe. It’s a galaxy and there are many others out there. Galaxies contain gas, dust, and billions of stars or more. They come in four main shapes: elliptical, spiral, peculiar, and irregular. Galaxies can colli
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Gerrymandering: Crash Course Government And Politics #37

746 views / 1 likes - added 8 years ago

Today Craig is going to talk about a topic that makes voters and politicians alike ANGRY! We're going to talk about Gerrymandering - that is the process in which voting districts are redrawn in a way to favor one party during elections. As you'll see, thi
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How The Elements Got Their Names

1,076 views / 0 likes - added 8 years ago

There's a story inside every box SUBSCRIBE, it's FREE! http://bit.ly/iotbs_sub ↓ More below ↓ Ever wonder what all those names on the periodic table actually mean? There's a whole lot of fascinating history on Mendeleev's table. Some carry names
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Galaxies, Part 2: Crash Course Astronomy #39

664 views / 0 likes - added 8 years ago

Active galaxies pour out lots of energy, due to their central supermassive black holes gobbling down matter. Galaxies tend not to be loners, but instead exist in smaller groups and larger clusters. Our Milky Way is part of the Local Group, and will one da
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Do Animals Mourn Their Dead? (ft. BrainCraft And Gross Science!)

616 views / 0 likes - added 8 years ago

This episode is brought to you by Dropbox https://www.dropbox.com/ Follow me to Gross Science: https://youtu.be/kRUt9pqMCSg and BrainCraft: https://youtu.be/Joalg73L_gw ↓ More info and sources below ↓ Tweet ⇒ http://bit.ly/OKTBSmourn Share on FB ⇒ http://
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The REAL Physics Of Hot Air Balloons!

719 views / 0 likes - added 8 years ago

This episode is brought to you by Dropbox https://www.dropbox.com/ Tweet ⇒ http://bit.ly/OKTBShotair Share on FB ⇒ http://bit.ly/OKTBShotairFB ↓ More info and sources below ↓ We uploaded another version of this video on 11/9 but it had a big mistake in it
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Gamma-Ray Bursts: Crash Course Astronomy #40

771 views / 1 likes - added 8 years ago

Gamma-ray bursts are not only incredible to study, but their discovery has an epic story all its own. Today Phil takes you through some Cold War history and then dives into what we know. Bursts come in two rough varieties: Long and short. Long ones are fr
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Can Coral Reefs Survive Climate Change? #OursToLose

1,066 views / 5 likes - added 8 years ago

This episode is brought to you by Dropbox https://www.dropbox.com/ Tweet ⇒ http://bit.ly/OKTBScoral Share on FB ⇒ http://bit.ly/OKTBScoralFB ↓ More info and sources below ↓ We can’t afford to wait any longer to act on climate change. Check out #OursToLose
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The Strange Science Of The Placebo Effect

805 views / 1 likes - added 8 years ago

This episode is brought to you by Dropbox https://www.dropbox.com/ Tweet ⇒ http://bit.ly/OKTBSplacebos Share on FB ⇒ http://bit.ly/OKTBSplaceboFB ↓ More info and sources below ↓ Follow me to Reactions to learn what is (and isn’t) in those vitamin suppleme
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Could Planet Minecraft Actually Exist?

1,209 views / 3 likes - added 8 years ago

This episode is brought to you by Dropbox https://www.dropbox.com/ Tweet ⇒ http://bit.ly/OKTBSmcraft Share on FB ⇒ http://bit.ly/OKTBSmcraftFB ↓ More info and sources below ↓ Gravitational field of a cubic planet: Chappell, James Michael, et al. "The grav
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Dark Matter: Crash Course Astronomy #41

618 views / 1 likes - added 8 years ago

Today on Crash Course Astronomy, Phil dives into some very dark matters. The stuff we can actually observe in the universe isn’t all there is. Galaxies and other large structures in the universe are created and shifted by a force we detect mostly indirect
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The Big Bang: Crash Course Astronomy #42

942 views / 0 likes - added 8 years ago

Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the universe began - with a
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Dark Energy, Cosmology Part 2: Crash Course Astronomy #43

612 views / 0 likes - added 8 years ago

The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy accelerates the expansion of space. We think this means the Universe will expand f
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The 12 Days Of Evolution - Complete Series!

702 views / 0 likes - added 8 years ago

All 12 days… in ONE video! Prefer the individual videos? Go here: http://bit.ly/OKTBS12daysPL ↓ More info and sources below ↓ I *highly* recommend these books: “Undeniable” by Bill Nye http://amzn.to/1TK3wZs “Why Evolution Is True” by Jerry Coyne http://a
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Interest Group Formation: Crash Course Government And Politics #43

624 views / 1 likes - added 8 years ago

So last week we talked about what special interest groups are and how they influence the political system, and today we’re going to focus on why we even have them in the first place. As to avoid getting too cynical, we’re going to focus on five benefits o
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A Brief History Of The Universe: Crash Course Astronomy #44

948 views / 0 likes - added 8 years ago

Thanks to the wonders of physics, astronomers can map a timeline of the universe’s history. Today, Phil’s going to give you an overview of those first few minutes (yes, MINUTES) of the universe’s life. It started with a Big Bang, when the Universe was inc
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This Is A SUPER BLOOD MOON! Lunar Eclipses Explained

645 views / 1 likes - added 8 years ago

This episode is brought to you by Dropbox https://www.dropbox.com/ Tweet ⇒ bit.ly/OKTBSredmoon Share on FB ⇒ http://bit.ly/OKTBSredmoonF ↓ More info and sources below ↓ We’ve got t-shirts! Get yours here: http://store.dftba.com/collections/its-okay-to-be-
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Deep Time: Crash Course Astronomy #45

727 views / 0 likes - added 8 years ago

As we approach the end of Crash Course Astronomy, it’s time now to acknowledge that our Universe’s days are numbered. Stars will die out after a few trillion years, protons will decay and matter will dissolve after a thousand trillion trillion trillion ye
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Who Shares Your Birthday?

848 views / 2 likes - added 8 years ago

Tweet this ⇒ http://bit.ly/OKTBSbday Share on FB ⇒ http://bit.ly/OKTBSbdayFB Click here if you’d like to subscribe: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ In case you have a strange new desire to get an IOTBS shirt: http://store.dftba.com
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07:31 Popular
Could Bigfoot REALLY Exist?

1,047 views / 1 likes - added 8 years ago

This episode brought to you by Squarespace: http://squarespace.com/itsokaytobesmart PBS Idea Channel goes to Area 51: https://youtu.be/WCFJh0fdlD8 ↓ More info and sources below ↓ **Check out these books: “The Demon Haunted World - Science as a Candle in t
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Media Institution: Crash Course Government And Politics #44

691 views / 0 likes - added 8 years ago

So today we're going to look at the rather thorny issue of the media and its role in politics. Wether you're talking about older forms of media like newspapers and radio or newer forms like television and the Internet, all media serves the same purpose -
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Everything, The Universe...And Life: Crash Course Astronomy #46

802 views / 1 likes - added 8 years ago

Here it is, folks: the end. In our final episode of Crash Course Astronomy, Phil gives the course a send off with a look at some of his favorite topics and the big questions that Astronomy allows us to ask. Thank you for watching. -- Crash Course Astronom
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Epic Space Rescues Ft. BrainCraft

1,013 views / 0 likes - added 8 years ago

Follow me over to BrainCraft and subscribe! https://www.youtube.com/watch?v=Y19fwDEfQ8E In The Martian, astronaut Mark Watney is stranded alone on Mars and must be rescued. It is an exciting tale of what could happen once humans start traveling to the red
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Media Regulation: Crash Course Government And Politics #45

630 views / 0 likes - added 8 years ago

Today we wrap up our discussion of the media by talking about how the government interacts with and influences the content we see. Now it may be easy to assume that because we live in a free-market capitalist society, the only real regulation of the media
04:12
This Is Not A Rainbow

686 views / 4 likes - added 8 years ago

Tweet this ⇒ http://bit.ly/OKTBSchz Share on FB ⇒ http://bit.ly/OKTBSchzFB Check out Squarespace: http://squarespace.com/itsokaytobesmart ↓ More info and sources below ↓ The ABSOLUTE best place to learn more about atmospheric optics: http://www.atoptics.c
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09:39 Popular
Market Economy: Crash Course Government And Politics #46

868 views / 1 likes - added 8 years ago

Today, we’re going to take a look at how the government plays a role in the economy. Specifically, the way the government creates and maintains our market economic system. Now sure, the government’s role in the economy can be controversial, some may even
03:29 Popular
Why Seasons Make No Sense

756 views / 0 likes - added 8 years ago

Tweet this ⇒ http://bit.ly/OKTBSseas Share on FB ⇒ http://bit.ly/OKTBSseasFB ↓ More info and sources below ↓ Sources: Trenberth, Kevin E. "What are the seasons?." Bulletin of the American Meteorological Society 64.11 (1983): 1276-1282.
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Government Regulation: Crash Course Government And Politics #47

735 views / 2 likes - added 8 years ago

Today, we’re going to wrap up our discussion of economic policy by looking at government regulation. We're going to talk about the government's goals for the U.S. economy and the policies it employs to achieve those goals. Ever since the New Deal, we've s
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What Is Philosophy?: Crash Course Philosophy #1

1,010 views / 0 likes - added 8 years ago

Today Hank begins to teach you about Philosophy by discussing the historical origins of philosophy in ancient Greece, and its three main divisions: metaphysics, epistemology, and value theory. He will also introduce logic, and how you’re going to use it t
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100,000,000 Years From Now

942 views / 0 likes - added 8 years ago

Try Squarespace: http;//squarespace.com/itsokaytobesmart Tweet this ⇒ http://bit.ly/OKTBS100MY Share on FB ⇒ http://bit.ly/OKTBS100MYfb ↓ More info and sources below ↓ For more science and stories of the Anthropocene, subscribe to the Generation Anthropoc
09:19 Popular
Monetary And Fiscal Policy: Crash Course Government And Politics #48

815 views / 0 likes - added 8 years ago

Today, Craig is going to dive into the controversy of monetary and fiscal policy. Monetary and fiscal policy are ways the government, and most notably the Federal Reserve, influences the economy - for better or for worse. So we’re going to start by lookin
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How To Argue - Philosophical Reasoning: Crash Course Philosophy #2

888 views / 0 likes - added 8 years ago

Before we dive into the big questions of philosophy, you need to know how to argue properly. We’ll start with an overview of philosophical reasoning and breakdown of how deductive arguments work (and sometimes don’t work). -- Images and video via VideoBlo
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Is Big Data Getting Too Big?

820 views / 0 likes - added 8 years ago

Try Lynda.com: http://lynda.com/okay Tweet this ⇒ http://bit.ly/OKTBSdata Share on FB ⇒ http://bit.ly/OKTBSdataFB ↓ More info and sources below ↓ Check out Stanford’s “Raw Data” podcast: https://soundcloud.com/rawdatapodcast https://itunes.apple.com/us/po
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How Do Squirrels Find Nuts?

796 views / 0 likes - added 8 years ago

Try Squarespace: http://squarespace.com/okaytobesmart You’d have to be nuts not to love this video! ↓ More info and sources below ↓ Special thanks to Jason Goldman (@jgold85) for help with this episode! References: Jacobs, Lucia F., and Emily R. Liman. "G
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10:00 Popular
Foreign Policy: Crash Course Government And Politics #50

2,173 views / 1 likes - added 8 years ago

Today Craig finishes up our series on U.S. Government and Politics by talking about both the least and most important aspect of government: foreign policy. Foreign policy is important because it has the potential to affect the largest number of people, bu
09:03
Leonardo DiCaprio & The Nature Of Reality: Crash Course Philosophy #4

699 views / 0 likes - added 8 years ago

Today Hank gains insight from that most philosophical of figures...Leonardo DiCaprio. In this episode, we’re talking about the process of philosophical discovery and questioning the relationship between appearance and reality by taking a look at Plato’s f
08:54 Popular
Social Policy: Crash Course Government And Politics #49

1,992 views / 2 likes - added 8 years ago

Today, Craig is going to talk about social policy - in the United States this means achieving one of three goals: protecting Americans from risk, promoting equal opportunity, or assisting the poor. Many Americans strongly believe in individualism, that is
10:18 Popular
How To Argue - Induction & Abduction: Crash Course Philosophy #3

798 views / 1 likes - added 8 years ago

We continue our look at philosophical reasoning by introducing two more types: induction and abduction. Hank explains their strengths and weaknesses, as well as counterarguments and the Socratic method. -- Images and video via VideoBlocks or Wikimedia Com
07:13
Einstein Is Always Right: Gravitational Waves Edition

572 views / 0 likes - added 8 years ago

Try Squarespace: http://squarespace.com/itsokaytobesmart Tweet this ⇒ http://bit.ly/OKTBSgr Share on FB ⇒ http://bit.ly/OKTBSgrFB ↓ More info and sources below ↓ Check out this PBS Space Time playlist all about general and special relativity: https://yout
08:27
So You Want To Go To Mars?

594 views / 1 likes - added 8 years ago

Watch more at http://pbs.org/yearinspace Tweet this ⇒ http://bit.ly/OKTBSyis Share on FB ⇒ http://bit.ly/OKTBSyisFB ↓ More info and sources below ↓ Dig deeper: National Research Council. “Space Radiation Hazards and the Vision for Space Exploration: Repor
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Cartesian Skepticism - Neo, Meet Rene: Crash Course Philosophy #5

1,005 views / 0 likes - added 8 years ago

This week Hank introduces skepticism, exploring everything from the nature of reality through the eyes of a 17th century philosopher and, of course, The Matrix. -- Images and video via VideoBlocks or Wikimedia Commons, licensed under Creative Commons by 4
02:43
The Equinox Isn't What You Think It Is

532 views / 1 likes - added 8 years ago

Is the equinox really when day = night? Tweet this ⇒ http://bit.ly/OKTBSeq Share on FB ⇒ http://bit.ly/OKTBSeqFB ↓ More info and sources below ↓ Calculate day length where you live for any date: http://www.timeanddate.com/sun/ Very cool solar angle simula
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06:04 Popular
Is Energy Always Conserved?

1,355 views / 0 likes - added 8 years ago

This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl PBSDS Survey: https://www.surveymonkey.com/r/pbsds2016 When light passes through the universe and is redshifted by the expansion of space itself, how is energy conserved
05:55
How Many Trees Are There?

675 views / 1 likes - added 8 years ago

Let PBS know more about you and what digital series you’d like to see: http://surveymonkey.com/r/pbsds2016 Tweet this ⇒ http://bit.ly/OKTBStree Share on FB ⇒ http://bit.ly/OKTBStreeFB Try Squarespace: http://squarespace.com/itsokaytobesmart ↓ More info an
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08:57 Popular
Karl Popper, Science, And Pseudoscience: Crash Course Philosophy #8

708 views / 1 likes - added 8 years ago

The early 1900s was an amazing time for Western science, as Albert Einstein was developing his theories of relativity and psychology was born, as Sigmund Freud and psychoanalysis took over the scientific mainstream. Karl Popper observed these developments
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The Meaning Of Knowledge: Crash Course Philosophy #7

770 views / 0 likes - added 8 years ago

On today’s episode...CATS. Also: Hank talks about some philosophy stuff, like a few of the key concepts philosophers use when discussing belief and knowledge, such as what defines an assertion and a proposition, and that belief is a kind of propositional
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Locke, Berkeley, & Empiricism: Crash Course Philosophy #6

752 views / 0 likes - added 8 years ago

This week we answer skeptics like Descartes with empiricism. Hank explains John Locke’s primary and secondary qualities and why George Berkeley doesn’t think that distinction works -- leaving us with literally nothing but our minds, ideas, and perceptions
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Anselm And The Argument For God: Crash Course Philosophy #9

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Today we are introducing a new area of philosophy – philosophy of religion. We are starting this unit off with Anselm’s argument for God’s existence, while also considering objections to that argument. -- “That’s a Neigh” David Goehring https://www.flickr
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Motion In A Straight Line: Crash Course Physics #1

1,686 views / 1 likes - added 8 years ago

In this, THE FIRST EPISODE of Crash Course Physics, your host Dr. Shini Somara introduces us to the ideas of motion in a straight line. She talks about displacement, acceleration, time, velocity, and the definition of acceleration. Also, how does a physic
05:27
Is Inheritance Really All In Our Genes?

520 views / 0 likes - added 8 years ago

Epigenetic inheritance is really weird, but is it real? Tweet this ⇒ http://bit.ly/OKTBSepi Share on FB ⇒ http://bit.ly/OKTBSepiFB ↓ More info and sources below ↓ Crash Course Physics with Dr. Shini Somara: https://www.youtube.com/user/crashcourse Want mo
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How Do Bees Make Honey?

1,483 views / 2 likes - added 8 years ago

Let PBS know more about you and what digital series you’d like to see: http://surveymonkey.com/r/pbsds2016 Tweet this ⇒ http://bit.ly/OKTBShunE Share on FB ⇒ http://bit.ly/OKTBShunEfb ↓ More info and sources below ↓ Check out our BEE PLAYLIST! http://bit.
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10:02 Popular
Derivatives: Crash Course Physics #2

1,115 views / 0 likes - added 8 years ago

CALCULUS! Today we take our first steps into the language of Physics; mathematics. Every branch of science has its own way to describe the things that it investigates. And, with Physics, that's math. In this episode, Shini talks us through derivatives and
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Aquinas And The Cosmological Arguments: Crash Course Philosophy #10

741 views / 0 likes - added 8 years ago

Our unit on the philosophy of religion and the existence of god continues with Thomas Aquinas. Today, we consider his first four arguments: the cosmological arguments. -- Images and video via VideoBlocks or Wikimedia Commons, licensed under Creative Commo
10:09
Integrals: Crash Course Physics #3

634 views / 0 likes - added 8 years ago

Continuing with last week's introduction of calculus, Shini leads us through the ways that integrals can help us figure out things like distance when we have several other key bits of information. Say, for instance, you wanted to know how far your window
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Are You Smarter Than A Slime Mold?

733 views / 0 likes - added 8 years ago

Follow me to Deep Look! https://youtu.be/Nx3Uu1hfl6Q Tweet this ⇒ http://bit.ly/OKTBSslime Share on FB ⇒ http://bit.ly/OKTBSslimeFB ↓ More info and sources below ↓ I really hope you guys check out Deep Look, it’s one of my favorite channels, full of great
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13:41
How Cosmic Inflation Flattened The Universe | Space Time | PBS Digital Studios

683 views / 0 likes - added 8 years ago

Let PBS know what type of digital series you'd like to see by taking this survey: https://www.surveymonkey.com/r/pbsds2016 How does Inflation solve the Big Bang’s problems? Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetim
14:17
Why Is The Earth Round And The Milky Way Flat? | Space Time | PBS Digital Studios

624 views / 0 likes - added 8 years ago

Let PBS know what type of digital series you'd like to see by taking this survey: https://www.surveymonkey.com/r/pbsds2016 Why does our universe make spheres and disks? Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Fa
06:07 Popular
Why Are You Multicellular?

796 views / 0 likes - added 8 years ago

Start your Audible trial today: http://www.audible.com/ok Tweet this ⇒ http://bit.ly/OKTBSmc Share on FB ⇒ http://bit.ly/OKTBSmcFB ↓ More info and sources below ↓ Check out Destin’s video on Smarter Every Day: “DEVIL FACIAL TUMOR DISEASE” https://www.yout
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11:04 Popular
Newton's Laws: Crash Course Physics #5

1,708 views / 2 likes - added 8 years ago

I'm sure you've heard of Isaac Newton and maybe of some of his laws. Like, that thing about "equal and opposite reactions" and such. But what do his laws mean? And how do they help us understand the world around us? In this episode of Crash Course Physics
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Vectors And 2D Motion: Crash Course Physics #4

641 views / 0 likes - added 8 years ago

Continuing in our journey of understanding motion, direction, and velocity... today, Shini introduces the ideas of Vectors and Scalars so we can better understand how to figure out motion in 2 Dimensions. But what does that have to do with baseball? Or tw
09:34 Popular
Intelligent Design: Crash Course Philosophy #11

859 views / 0 likes - added 8 years ago

Last week we introduced Thomas Aquinas’s four cosmological arguments for the existence of god; today we introduce his fifth argument: the teleological argument, and the ensuing dialogue it initiated. -- Bokeh Spiral by Eric Wüstenhagen: https://www.flickr
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Friction: Crash Course Physics #6

1,310 views / 2 likes - added 8 years ago

This episode is sponsored by Audible. Try Audible: http://audible.com/crashcourse Why is it hard to move a heavy bookcase across a carpeted floor? And why is it easier to keep it moving than it was to get it started moving? You might think it's all about
10:32 Popular
What Is God Like?: Crash Course Philosophy #12

749 views / 0 likes - added 8 years ago

Today we are moving on from the existence of God to look at the philosophical debate surrounding the traditional divine attributes - omnipotence, omniscience, omnitemporality, and omnibenevolence. We are exploring the puzzles that these attributes create
06:40
The Most Important Moment In The History Of Life

567 views / 0 likes - added 8 years ago

Get your #ididascience shirt here! http://dftba.com/besmart Tweet this ⇒ http://bit.ly/OKTBSpwr Share on FB ⇒ http://bit.ly/OKTBSpwrFB ↓ More info and sources below ↓ If you want to read more (MUCH more) about this, check out “The Vital Question” by Nick
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The Problem Of Evil: Crash Course Philosophy #13

718 views / 0 likes - added 7 years ago

After weeks of exploring the existence of nature of god, today Hank explores one of the biggest problems in theism, and possibly the biggest philosophical question humanity faces: why is there evil? -- Images and video via VideoBlocks or Wikimedia Commons
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The Cosmic Afterglow

621 views / 0 likes - added 7 years ago

Get your #ididascience shirt here! http://dftba.com/besmart Tweet this ⇒ http://bit.ly/OKTBScmb Share on FB ⇒ http://bit.ly/OKTBScmbFB ↓ More info and sources below ↓ Vintage Project Echo footage from “The Big Bounce” (1960): https://archive.org/details/B
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09:47
Anti-Vaxxers, Conspiracy Theories & Epistemic Responsibility: Crash Course Philosophy #14

671 views / 1 likes - added 7 years ago

Today we explore what obligations we hold with our personal beliefs. Hank explains epistemic responsibility and the issues it raises with everything from religious belief, to ship owning, to vaccinations. -- Images via Wikimedia Commons, licensed under Cr
09:54 Popular
Uniform Circular Motion: Crash Course Physics #7

1,345 views / 0 likes - added 7 years ago

Did you know that centrifugal force isn't really a thing? I mean, it's a thing, it's just not real. In fact, physicists call it a "Fictitious Force." Mind blown yet? To explore this idea further, this week Shini sits down with us to discuss centripetal fo
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6 Chemical Reactions That Changed History

1,495 views / 1 likes - added 7 years ago

Chemicals React! Get yourself an awesome IOTBS shirt! http://dftba.com/besmart ↓ More info and sources below ↓ For lots more of history’s greatest chemical innovations, check out “The Chemistry Book” by Derek B. Lowe: http://amzn.to/1snWG44 ---- Have an i
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