In this video, Vsauce Michael, Kevin, and Jake discuss several intriguing topics.
Firstly, they ponder the scenario of a perfectly spherical Earth with a rope stretched around its equator. If the rope were extended by six meters, it wouldn't fit snugly around the Earth due to the relationship between the circumference and the radius. Instead, it would float one meter above the Earth. If a more rigid structure like a bridge were built all the way around the Earth and then its supports were destroyed, the Earth's gravity would pull it down, but the other side of the bridge would be in the opposite direction, making the bridge incredibly unstable.
Next, they discuss a hypothetical situation where a person is stranded in the mountains and has to decide whether to amputate one of their legs to eat it. They conclude that while it might seem like a good idea to eat the food, the trauma of losing a limb would greatly exceed the benefit gained by eating the food.
They also touch on the topic of hair growth, explaining how head hair typically grows for around six years in its anagen phase, but the anagen phase of body hair elsewhere is much shorter.
Lastly, they discuss eye floaties, which are made of little fibrils that occur in the eye as you age. They are almost always microscopic, and you can only see them inside your eye.
They also mention an article about the English-language Wikipedia, which contains about two billion three hundred and forty-five million words. If printed at the density of the Encyclopedia Britannica, this would equal about 1759 volumes, weighing about 7000 pounds.
They encourage viewers to check out the Google Science Fair, where they helped create an Earth Bridge animation.
The video ends with the three hosts expressing their excitement about being in Santa Monica together and thanking the viewers for watching.
1. The text is a transcript of a video by Vsauce, featuring Michael, Kevin, and Jake.
2. The video was filmed in Santa Monica, with Vsauce standing for the Roman numeral V.
3. The first question was asked by a person named Knotch.
4. The question revolves around the concept of an earth that's perfectly spherical and a rope stretched around its equator snugly.
5. If the rope was six meters longer, it would not fit snugly around the earth but one meter above it.
6. If a more rigid structure like a bridge was built around the earth and all its supports were destroyed at once, it would be incredibly unstable due to Earth's non-uniform gravity.
7. Earth's gravity isn't equal everywhere, and it changes based on the density of rock below, as well as the influence of the Sun and the moon.
8. If the bridge itself was indestructible, it would start violently hula-hooping around the earth, crushing things.
9. A sphere around the earth would be a bit more stable than a ring, but a ring, even if spinning, would rapidly break apart into smaller pieces.
10. The video also discusses a hypothetical scenario of a person stranded in the mountains, waiting for rescuers, and considering amputating their leg to eat.
11. The speakers argue that it would be better to keep the leg on and let it wither away, as the body's process of using energy reserves is more efficient than digestion.
12. There's a discussion about the growth of hair, with the speakers noting that head hair does not keep growing indefinitely, typically around 6 years.
13. The speakers speculate that humans lost their thick body hair because it didn't help them in hunting and running around in the savanna, unlike the thick fur coats of other animals.
14. They also discuss the phenomenon of eye floaties, which are made out of little fibrils that occur in the eye as you age.
15. The speakers are amused by the fact that eye floaties are almost always microscopic and can't be seen with the naked eye, except when they are inside your eye.
16. Finally, there's a discussion about the weight of the English-language Wikipedia, which contains about 2.345 billion words. If printed at the density of the Encyclopedia Britannica, it would equal about 1759 volumes, weighing about 7,000 pounds.