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  • 09:46 Observation of the Development of Chick Embryo

    Observation of the Development of Chick Embryo

    513 views / 1 likes - added

    Observation of the development of chick embryo by shell-less hatching method. This demonstration is practiced mainly based on the scientific article written by Tahara et. al. If you are scientist, you can reach it easily, because it is open accessed artic

  • 08:47 Phillips Curve

    Phillips Curve

    571 views / 0 likes - added

    The observation that inflation and unemployment tend to be inversely correlated More free lessons at: http://www.khanacademy.org/video?v=v7ZWTZ9NgU4

  • 10:51 Popular Psychological Research - Crash Course Psychology #2

    Psychological Research - Crash Course Psychology #2

    808 views / 1 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 08:37 Why can't you go faster than light?

    Why can't you go faster than light?

    462 views / 0 likes - added

    One of the most counterintuitive facts of our universe is that you can’t go faster than the speed of light. From this single observation arise all of the mind-bending behaviors of special relativity. But why is this so? In this in-depth video, Fermilab’s

  • 11:44 Popular Evolution: It's a Thing - Crash Course Biology #20

    Evolution: It's a Thing - Crash Course Biology #20

    1,138 views / 0 likes - added

    Hank gets real with us in a discussion of evolution - it's a thing, not a debate. Gene distribution changes over time, across successive generations, to give rise to diversity at every level of biological organization. Crash Course Biology is now availabl

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  • 05:17 Mystery box #3 disappearing egg yoke // Homemade Science with Bruce Yeany

    Mystery box #3 disappearing egg yoke // Homemade Science with Bruce Yeany

    220 views / 0 likes - added

    Here is another mystery box from my classroom that I was used to challenge student's powers of observation. A raw egg is broken on the side of a container and the yoke is dropped inside. A cardboard square is placed on top one the opening and then the who

  • 05:24 First Images of Black Holes!

    First Images of Black Holes!

    387 views / 0 likes - added

    The Event Horizon Telescope Collaboration observed the supermassive black holes at the center of M87 and our Milky Way galaxy (SgrA*) finding the dark central shadow in accordance with General Relativity, further demonstrating the power of this 100 year-o

  • 06:33 Mystery box #3 revealed, disappearing egg yoke // Homemade Science with Bruce Yeany

    Mystery box #3 revealed, disappearing egg yoke // Homemade Science with Bruce Yeany

    237 views / 0 likes - added

    Here is the answer to the mystery box shown in the previous video. These were used in my classroom as a challenge to my student's powers of observation. A raw egg is broken on the side of a container and the yoke is dropped inside. A cardboard square is p

  • 04:17 Popular Why The Octopus Brain Is So Extraordinary - Cláudio L. Guerra

    Why The Octopus Brain Is So Extraordinary - Cláudio L. Guerra

    1,045 views / 3 likes - added

    View full lesson: http://ed.ted.com/lessons/why-the-octopus-brain-is-so-extraordinary-claudio-l-guerra Octopuses have the ability to solve puzzles, learn through observation, and even use tools – just like humans. But what makes octopus intelligence so am

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  • 01:25 Watch this eel inflate its head like a balloon

    Watch this eel inflate its head like a balloon

    516 views / 0 likes - added

    First direct observation of hunting pelican eel reveals a bizarre fish with an inflatable head. Rare video shows deep-sea eel expanding its unusual jaws to capture prey. Read more: https://scim.ag/2xWFKY1 For permissions information, contact the Rebikoff-

  • 26:55 ChatGPT: 30 Year History | How AI Learned to Talk

    ChatGPT: 30 Year History | How AI Learned to Talk

    4 views / 0 likes - added

    This video explores the journey of AI language models, from their modest beginnings through the development of OpenAI's GPT models. Our journey takes us through the key moments in generative neural network research involved in next word prediction. We del

  • 05:22 Popular Create Constellation Flash Cards - #sciencegoals

    Create Constellation Flash Cards - #sciencegoals

    774 views / 1 likes - added

    Jessi has a special guest today who is an expert on the night sky! Join Jessi and Sam the Bat to learn all about constellations, and to test your star knowledge by making flash cards! Constellation Charts for Viewers: Constellation Maps by Latitude: http:

  • 49:18 Civilisation: A Personal View by Kenneth Clark, Ep. 08 "The Light of Experience"

    Civilisation: A Personal View by Kenneth Clark, Ep. 08 "The Light of Experience"

    347 views / 0 likes - added

    Clark tells of new worlds in space and in a drop of waterworlds that the telescope and microscope revealedand the new realism in the Dutch paintings of Rembrandt and other artists that took the observation of human character to a new stage of development

  • 02:52 How it looks (and sounds) when two stars collide

    How it looks (and sounds) when two stars collide

    486 views / 0 likes - added

    Researchers say an explosion spotted in space is one of the most scientifically important astronomical events ever. Here's what happened. SUBSCRIBE: https://goo.gl/kdDpXu Today scientists announced one of the most important astronomical discoveries ever:

  • 03:50 Heavy Metal Cataclysm

    Heavy Metal Cataclysm

    604 views / 0 likes - added

    Until recently, most scientists believed the heaviest elements were formed by the incredible energy of supernovae. However, no direct observation of heavy element creation by supernovae have been made and computer simulations of the events do not produce

  • 09:35 Popular The Bobo Beatdown - Crash Course Psychology #12

    The Bobo Beatdown - Crash Course Psychology #12

    845 views / 0 likes - added

    You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

  • 06:15 Popular Sesame Street: Super Grover's Search for a Needle in a Haystack

    Sesame Street: Super Grover's Search for a Needle in a Haystack

    899 views / 1 likes - added

    A lamb has lost it's knitting needle in a haystack. Will Super Grover 2.0 be able to use his powers of observation and investigation to save the day? Tune in to find out. Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_cen

  • 04:44 Popular Gravitational Waves Discovered! Here's What You Need To Know

    Gravitational Waves Discovered! Here's What You Need To Know

    851 views / 1 likes - added

    The very first gravitational wave has been detected by LIGO, proving Albert Einstein’s Theory of Relativity! Where did it come from and what does it mean for the future of space science? Gravitational Waves Explained ►►►► http://bit.ly/1PQcq8A Sign Up For

  • 06:14 Popular Sesame Street: Super Grover Helps a Cow Down the Stairs

    Sesame Street: Super Grover Helps a Cow Down the Stairs

    973 views / 1 likes - added

    At a beauty parlor in a bustling metropolis, one cow has gone a step too far. Super Grover 2.0 uses observation, questioning, and investigation to help this bovine beauty carefully descend a treacherous staircase. Subscribe to the Sesame Street Channel he

  • 07:05 Popular CLONE TURBO TANK - LEGO Star Wars Set 75151 Time-lapse, Unboxing & Review

    CLONE TURBO TANK - LEGO Star Wars Set 75151 Time-lapse, Unboxing & Review

    1,314 views / 7 likes - added

    Click here to see more LEGO videos: https://www.youtube.com/playlist?list=PL7TV22RuQ4DasGid60aNBhpEtuqBSV6AL LEGO SIMPSONS HOUSE: http://youtu.be/s0OEEC0VD_Y LEGO Star Wars UCS SANDCRAW:ER: http://youtu.be/W9_UaowoB7w LEGO Star Wars DEATH STAR: http://you

  • 01:38 Ultra High Definition (4K) View of Planet Earth

    Ultra High Definition (4K) View of Planet Earth

    608 views / 0 likes - added

    NASA monitors Earth's vital signs from land, air and space with a fleet of satellites and ambitious airborne and ground-based observation campaigns. The International Space Station hosts a variety of payloads and experiments supporting climate research, w

  • 08:59 Popular Special Relativity: Crash Course Physics #42

    Special Relativity: Crash Course Physics #42

    739 views / 0 likes - added

    This episode of Crash Course Physics is supported by Prudential. Go to www.raceforretirement.com to learn how, if you start saving today, you can continue to enjoy the things you love tomorrow. So we've all heard of relativity, right? But... what is relat

  • 06:17 Popular Sesame Street: Super Grover Paints a Still Life

    Sesame Street: Super Grover Paints a Still Life

    777 views / 1 likes - added

    In an artist studio in France, a Parisian pineapple is about to paint, but encounters a perplexing problem. The poor pineapple cannot properly place her produce friends on a pedestal for their portrait. Super Grover 2.0 unleashes his powers of observation

  • 19:35 Computer Scientist Explains One Concept in 5 Levels of Difficulty | WIRED

    Computer Scientist Explains One Concept in 5 Levels of Difficulty | WIRED

    175 views / 0 likes - added

    Moravec's paradox is the observation that many things that are difficult to do for robots to do come easily to humans, and vice versa. Stanford University professor Chelsea Finn has been tasked to explain this concept to 5 different people; a child, a tee

  • 03:27 White Holes (if they exist) could explain some of the weirdest aspects of our universe

    White Holes (if they exist) could explain some of the weirdest aspects of our universe

    350 views / 0 likes - added

    Thanks for watching. Sources: Astronomers Capture First Image of a Black Hole https://www.almaobservatory.org/en/press-release/astronomers-capture-first-image-of-a-black-hole/ LIGO Detection Papers https://www.ligo.caltech.edu/page/detection-companion-pap

  • 19:47 A Picture of the Milky Way's Supermassive Black Hole

    A Picture of the Milky Way's Supermassive Black Hole

    151 views / 0 likes - added

    This is an image of the supermassive black hole, Sagittarius A*, at the center of our Milky Way galaxy. Visit https://www.kiwico.com/veritasium30 to get 30% off your first month of any crate! Image of Sgr A* from EHT collaboration Event Horizon Telescope

  • 04:35 Popular Why Every Picture Of A Black Hole Is An Illustration

    Why Every Picture Of A Black Hole Is An Illustration

    723 views / 0 likes - added

    Scientists are pretty sure black holes are real. Soon they'll know for sure. Subscribe to our channel! http://goo.gl/0bsAjO The biggest problem with trying to detect a black hole is that even the supermassive ones are relatively tiny. "The largest one in

  • 03:13 This 360-Degree Theater Lets You Experience VR Without A Headset

    This 360-Degree Theater Lets You Experience VR Without A Headset

    654 views / 0 likes - added

    This theater takes VR to a whole new level. Space 360 is a spherical projection theater. It creates a small universe around viewers. This eliminates the need for VR headsets. The theater is located next to Lucerium National Science Museum in Gwangju, Sout

  • 04:04 How to Become a More Interesting Person

    How to Become a More Interesting Person

    47 views / 1 likes - added

    We tend to evaluate people on how interesting they are. But we are thereby liable to miss a more acute and relevant issue: how interesting does a given person make us feel? Why in the company of some do our minds quickly fill with stories, while around ot

  • 04:32 What if the Universe Was Lopsided?

    What if the Universe Was Lopsided?

    259 views / 0 likes - added

    A new study suggests that our universe might not be isotropic like we thought, but instead it could actually be anisotropicmeaning we might live in a lopsided universe. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/

  • 04:00 Popular What is the Zeroth Law of Thermodynamics?

    What is the Zeroth Law of Thermodynamics?

    1,189 views / 0 likes - added

    Why is there a zeroth law of thermodynamics? What use is such a simple-sounding law? And how can it be used to smash glass? Chemical engineer Valeska Ting explains in the first film from our 2016 advent calendar, all about thermodynamics. Visit the online

  • 11:30 Popular Community Ecology: Feel The Love - Crash Course Ecology #4

    Community Ecology: Feel The Love - Crash Course Ecology #4

    970 views / 0 likes - added

    Interactions between species are what define ecological communities, and community ecology studies these interactions anywhere they take place. Although interspecies interactions are mostly competitive, competition is pretty dangerous, so a lot of interac

  • 00:42 Snippet: 5-month time lapse of Mt. Kiluaea's summit collapse

    Snippet: 5-month time lapse of Mt. Kiluaea's summit collapse

    462 views / 0 likes - added

    The time lapse covers 5 months, followed by some nice flowing lava shots Read the paper: http://science.sciencemag.org/content/early/2019/01/15/science.aav7046 ABSTRACT In 2018, Kīlauea Volcano experienced its largest lower East Rift Zone (LERZ) eruption

  • 11:26 Popular 10 Tricky Riddles and Logic Puzzles To Sharpen Your Brain

    10 Tricky Riddles and Logic Puzzles To Sharpen Your Brain

    1,095 views / 3 likes - added

    If you are a Genius, can you solve this puzzle? So, test your ingenuity and knowledge with these top 10 amazing riddles and puzzles that 90% fail to answer. Subscribe to FactoFusion: http://bit.ly/FactoFusion Our Social Media: Like us on Facebook: https:/

  • 12:53 The Many Worlds of the Quantum Multiverse | Space Time | PBS Digital Studios

    The Many Worlds of the Quantum Multiverse | Space Time | PBS Digital Studios

    576 views / 1 likes - added

    Is our universe a definitive single reality or is it merely one within an infinitely branching multiverse? Be sure to check out Physics Girl’s Dianna Cowern for more awesome science https://www.youtube.com/c/physicsgirl Get your own Space Time t­shirt at

  • 08:10 Why Do You Love Your Family?

    Why Do You Love Your Family?

    488 views / 0 likes - added

    You can learn more about your personal DNA story by going to https://23andMe.com/okay Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ Why do we love people we’re related to? Compared to strangers, why d

  • 1:05:15 Popular Genetics As Revolution - 2015 JBS Haldane Lecture With Alison Woollard

    Genetics As Revolution - 2015 JBS Haldane Lecture With Alison Woollard

    720 views / 0 likes - added

    The ideas of genetics are revolutionary. Today, technology is galvanising disruptive change in our understanding and ability to intervene with nature itself. What can we change, and should we? Professor Alison Woollard presents the 2015 Genetics Society J

  • 06:47 Popular We’re Not Saying The Kepler Discovery Is Aliens, But…

    We’re Not Saying The Kepler Discovery Is Aliens, But…

    725 views / 0 likes - added

    The Internet is abuzz with the possible discovery of an alien megastructure around a faraway star. Do actual scientists believe this theory? What Could Alien Life Really Look Like? ►►►► http://dne.ws/18iqEwc DNews Live Tickets Here ►►►► http://dne.ws/1Fa2

  • 10:12 Birds In A Truck Riddle

    Birds In A Truck Riddle

    463 views / 1 likes - added

    Watch my newest video, "The Game You Win By Losing (Parrondo's Paradox)": https://youtu.be/PpvboBJEozMDownload Angry Birds 2 from your app store today! https://c.singular.net/api/v1/ad?st=59571402224&pcn=Vsauce2&psn=Vsauce2&h=133970888f55d20b2a1077b676434

  • 03:55 This Theory Suggests Our Perspective of Galaxies Could Be Wrong

    This Theory Suggests Our Perspective of Galaxies Could Be Wrong

    364 views / 0 likes - added

    Our perspective from Earth could be distorting our understanding of space. Here’s what you need to know about the theory of AGN unification. What Really Happens When Galaxies Collide - https://youtu.be/eWqETkudZXo Read More: Why It’s Hard to Recognize a B

  • 02:50 We Could Live in Caves on the Moon, Here’s Everything You Need to Know

    We Could Live in Caves on the Moon, Here’s Everything You Need to Know

    594 views / 0 likes - added

    The pits on the moon might lead to caves big enough to fit cities, but how were they formed? Could We Create A Livable Atmosphere On The Moon? - https://youtu.be/ksvlHp--TgA Get 20% off http://www.domain.com domain names and web hosting when you use coupo

  • 03:57 This Could Be the End of Urban Astronomy (360 Video)

    This Could Be the End of Urban Astronomy (360 Video)

    501 views / 0 likes - added

    City lights are blinding our view of space, and its forcing urban astronomers to rethink the way they make observations. To make matters worse, a change in the type of lights being used could be the end of some observatories. Plunging Down an Ice Track at

  • 03:07 Goodbye Silicon! Your Next Computer Chip Could Be Made of Gallium Oxide

    Goodbye Silicon! Your Next Computer Chip Could Be Made of Gallium Oxide

    598 views / 0 likes - added

    A new material may be coming for 'Silicon Valley' as researchers are looking towards gallium oxide to produce faster computer chips than ever before. Moore's Law Is Ending... So, What's Next? - https://youtu.be/Vv_2C95cO6s Read More: The dawn of gallium o

  • 12:02 The Logistics of Living in Antarctica

    The Logistics of Living in Antarctica

    479 views / 0 likes - added

    Get 20% off Brilliant premium by being one of the first 97 to sign up at http://brilliant.org/wendover Pre-order our new tshirt with the new logo: https://store.dftba.com/products/wendover-productions-logo-shirt Subscribe to Half as Interesting (The other

  • 03:38 Popular SCIENCE WARS - Acapella Parody

    SCIENCE WARS - Acapella Parody

    713 views / 2 likes - added

    iTunes: http://apple.co/1IBrCVG Bandcamp: http://bit.ly/1XO9Ik0 SUBSCRIBE: http://bit.ly/asapsci Follow us: @WhaleWatchMePlz and @MitchellMoffit Inspired by the amazing Jon Cozart and his fantastic Disney parodies: https://youtu.be/diU70KshcjA Lyrics by M

  • 01:00 Deep-sea squid mom carries eggs to keep them safe from predators

    Deep-sea squid mom carries eggs to keep them safe from predators

    154 views / 0 likes - added

    During a recent deep-sea dive, MBARI researchers encountered this incredibly rare sighta deep-sea squid (Bathyteuthis sp.) grasping hundreds of eggs in her arms. This squid mom was spotted at 1,390 meters (4,560 feet) deep more than 90 kilometers (56 mile

  • 08:42 Lens of Time: Secrets of Schooling | bioGraphic

    Lens of Time: Secrets of Schooling | bioGraphic

    587 views / 0 likes - added

    Shimmering schools of fish have dazzled scientists for centuries with their synchronized maneuvers. Now, high-speed video is revealing how—and why—they do it. ___ Originally published on bioGraphic: http://bit.ly/2ftce5K Produced by Spine Film

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  • 19:26 What Happens If A Star Explodes Near The Earth?

    What Happens If A Star Explodes Near The Earth?

    131 views / 0 likes - added

    People have witnessed supernovae for millennia, but what threat do they pose to life on Earth? This video is sponsored by Brilliant. You can get started for free, or the first 200 people to sign up via https://brilliant.org/veritasium get 20% off a yearly

  • 03:42 This Black Hole Is So Close You Can See It, Here's How

    This Black Hole Is So Close You Can See It, Here's How

    350 views / 2 likes - added

    A team of astronomers discovered a black hole lying just 1,000 light-years from Earth and its presence may hint at the existence of many more. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/ElementsPlaylist Visit our

  • 05:21 The Worlds First Room Temperature Superconductor Is Here

    The Worlds First Room Temperature Superconductor Is Here

    510 views / 0 likes - added

    For the first time ever, researchers have created a material that acts as a superconductor at nearly room temperature. But there's a catch. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/ElementsPlaylist Visit our sh

  • 02:44 Popular How Does Night Vision Work?

    How Does Night Vision Work?

    821 views / 0 likes - added

    Sure, night vision looks cool in the movies - but what is it, exactly? How can a scope or a pair of goggles help you see in near-absolute darkness? Learn more at HowStuffWorks.com: http://electronics.howstuffworks.com/gadgets/high-tech-gadgets/nightvision

  • 04:11 What Happens When You Put Antimatter in a Double Slit Experiment?

    What Happens When You Put Antimatter in a Double Slit Experiment?

    354 views / 0 likes - added

    Interference patterns with particles have stumped scientists for years, but when they put antimatter through the test, they revealed an even bigger mystery. This Is The Only Place Antimatter Can Survive In The Universe - https://youtu.be/XD8Q3Mb1Q4I Read

  • 05:29 Scientists Just Fit Our Universe in a BoxWait What

    Scientists Just Fit Our Universe in a BoxWait What

    317 views / 0 likes - added

    Scientists just released one of the most advanced simulations of our universe to date, and it fits into a box.How Scientists Are Hunting for the Universes First Stars - https://youtu.be/opHYp2kfj7U Subscribe to Seeker! http://bit.ly/subscribeseeker Watch

  • 07:49 Popular The Photoelectric Effect: Light As A Particle

    The Photoelectric Effect: Light As A Particle

    1,915 views / 0 likes - added

    A simple, easy-to-understand explanation of the experiment that proved the particle nature of light and won Einstein a nobel prize. The Photoelectric Effect. Hi! I'm Jade. I make fun physics videos that will make you smarter while making you smile :) ***S

  • 04:28 Scientists Just Witnessed the Birth of Two Stars in Stunning Detail

    Scientists Just Witnessed the Birth of Two Stars in Stunning Detail

    311 views / 0 likes - added

    Our knowledge of the early lives of stars is limited, but an exciting new observation provides a closer look at how stars are born. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/ElementsPlaylist Visit our shop at ht

  • 03:25 The Science of Hobbit Gluttony

    The Science of Hobbit Gluttony

    162 views / 0 likes - added

    Offset your carbon footprint with Wren! They'll plant 10 extra trees for each of the first 100 people who sign up at https://www.wren.co/start/minuteearth.Because smaller animals have to eat more relative to their bodyweight, Tolkeins hobbits need to eat

  • 02:49 Popular How Do Erasers Erase?

    How Do Erasers Erase?

    922 views / 0 likes - added

    Erasers lift our mistakes right off the page, but it's not magic - it's the microscopic physics of stickiness. Learn more at HowStuffWorks.com: http://electronics.howstuffworks.com/everyday-tech/erasers-erase.htm Share on Facebook: Share on Twitter: Subsc

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  • 16:32 Pilot Wave Theory and Quantum Realism | Space Time | PBS Digital Studios

    Pilot Wave Theory and Quantum Realism | Space Time | PBS Digital Studios

    556 views / 0 likes - added

    There’s one interpretation of the meaning of quantum mechanics that manages to skip a lot of the unphysical weirdness of the mainstream interpretations: it's de Broglie-Bohm pilot wave theory. Help us continue making this show by contributing here: https:

  • 09:13 NASA Engineered a Box to Create the Fifth State of Matter in Space

    NASA Engineered a Box to Create the Fifth State of Matter in Space

    342 views / 0 likes - added

    Atomic physicists at NASA are working to create an exotic state of matter...in space. And it turns out, the International Space Station is the perfect home base for these experiments. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Focal Poi

  • 05:23 Why Were Seeing More Gravitational Wave Events Than Ever Before

    Why Were Seeing More Gravitational Wave Events Than Ever Before

    236 views / 0 likes - added

    LIGO and Virgo recently updated their gravitational-wave catalog with 39 new discoveries, including signals that could help us probe unresolved mysteries about the universe further than ever before. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch

  • 04:20 Popular Scientists Just Captured This Rare Giant Squid Footage, Here's How

    Scientists Just Captured This Rare Giant Squid Footage, Here's How

    1,138 views / 3 likes - added

    Scientists know more about the surface of Mars than the largely unexplored deep sea, but new deep sea robots could offer a further glimpse of life in the Twilight Zone. Subscribe to Seeker!http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/E

  • 04:50 Did Scientists REALLY Find Signs of Life on Venus?

    Did Scientists REALLY Find Signs of Life on Venus?

    280 views / 1 likes - added

    Generally considered inhabitable, new observations suggest that Venus could in fact be harboring life. Where? In its clouds. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/ElementsPlaylist Visit our shop at http://sh

  • 04:24 How to Build the Universe

    How to Build the Universe

    493 views / 0 likes - added

    Don't build a universe at home before watching this! SUBSCRIBE: http://youtube.com/whatthephysics?sub ↓Want more info?↓ Scientific notes: Stellar mass black holes vs. supermassive black holes * Stellar mass black holes form from the collapse of massive st


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