- Rain contains vitamin B12.
- Babylonians measured the circumference of a circle as approximately 3 times the diameter, which is fairly close to today's measurement which uses the value of Pi (around 3.14)..
- It takes 17 muscles to smile and 43 to frown.
- A soap bubble is 10,000 times thinner than the average human hair.
- A hummingbird's heart beats at over a 1,000 times a minute.
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