The video explores the relationship between humans and outer space, specifically how our biology would adapt if we were born and raised in space. Currently, there are only six people in space, with over 500 humans having traveled to space since the first person reached outer space 52 years ago.
The video discusses how zero-gravity environments affect our bodies, including the fluid in our inner ears, which can cause motion sickness, visual illusions, and disorientation. It also explains how a lack of gravity can lead to spinal expansion, bone atrophy, and muscle loss.
The video then speculates on how children developing in space might be affected, potentially leading to weak and soft bones, thin legs, weak muscles, and poor eyesight. However, it emphasizes that much of this is speculation, as few studies have been conducted on the topic.
The video concludes by drawing parallels between humans and plankton, suggesting that we might be destined to wander and explore the universe, but also acknowledging that we still know very little about how our bodies grow and develop outside of Earth's environment.
Here are the key facts extracted from the text:
1. There are currently 6 people in space.
2. Over 500 humans have left Earth and gone to space since the first person reached outer space 52 years ago.
3. Humans have gone as far as the moon in space.
4. The International Space Station orbits about 370,000 meters above the Earth.
5. Astronauts in space experience weightlessness, but it's not zero gravity.
6. The concept of Zero-G refers to zero acceleration felt as weight.
7. Outer space is about 100,000 meters above the Earth's surface.
8. At that altitude, the atmosphere is too thin to provide lift, and an aircraft must travel at orbital speed to stay aloft.
9. Orbital speed is the speed at which an object falls towards the Earth, but the Earth curves away from it at the same rate.
10. There has been a continuous presence of humans in space for the last 12 years.
11. All humans born on Earth experience gravity, which affects our development and health.
12. In a zero-G environment, hot air doesn't rise, and a candle flame is not shaped by convection.
13. The enzyme responsible for stopping sperm movement doesn't work well in zero-G, and sperm swim faster in space.
14. The vestibular system in the inner ear is affected by zero-G, leading to motion sickness and disorientation.
15. About 50% of astronauts experience spaced adaptation syndrome.
16. Pregnant rats taken to space give birth to babies that struggle with directions and have trouble righting themselves in water.
17. In a zero-G environment, body fluids distribute evenly, causing puffy faces and bird legs in astronauts.
18. Astronauts can lose up to 22% of their total blood volume in space, leading to weaker hearts.
19. Radiation from the Sun and the universe is a significant threat to humans in space.
20. Mice exposed to radiation levels expected during interplanetary journeys show signs of brain damage and Alzheimer's-like symptoms.
21. Isolation in space can affect the immune system, leading to compromised T-cell function.
22. Astronauts in space can experience spinal expansion, growing up to 3% taller.
23. Without gravity, bones in space atrophy at a rate of about 1% per month.
24. Muscles in space atrophy at a rate of 5% per month, leading to a total muscle mass loss of 20%.
25. Tears don't work the same way in space due to surface tension.
26. Developing children in space may experience similar problems as adults, including bone loss and muscle atrophy.
27. The human body is not well adapted to living in space, and long-term exposure can lead to various health problems.
28. Plankton in the ocean are estimated to be more numerous than stars in our galaxy.
29. The name "plankton" comes from the Greek word for wanderer, which is also the origin of the word "planet".