A video explores various fascinating facts about the human body and its capabilities. The narrator starts by mentioning a team of pirates who died a terrible death due to a lack of vitamin C in their diet, which led to scurvy. The video then proceeds to showcase several experiments and tests that demonstrate the human body's unique features, such as the nasal cycle, where one nostril works better than the other, and the ability to perceive different smells. It also discusses the mantis shrimp's incredible eyesight and the human eye's limitations. Additionally, the video touches on the topic of dermographism, a phenomenon where the skin changes color when irritated, and the ability of some people to stick objects to their skin due to static electricity. The narrator also warns about the dangers of swallowing pool water, which can contain harmful bacteria like E. coli, and advises viewers not to pee in the pool. Furthermore, the video explores the effects of cracking one's knuckles and the benefits of massaging certain points on the body to relieve stress and improve health. Finally, it returns to the topic of scurvy, emphasizing the importance of vitamin C in the human diet and how it can be fatal if neglected.
Here are the key facts extracted from the text:
1. Pirates in the 15th century died from a disease caused by a lack of vitamin C in their diet.
2. The human body has a unique feature where one nostril works worse than the other, but this changes over time.
3. This change in nostril function is necessary for better perception of odors.
4. Some smells are better caught when air passes quickly, while others are better caught when air passes slowly.
5. The human body has an evolutionary adaptation that allows it to perceive smells in different ways.
6. Manta shrimp have highly developed eyes with three pseudo-pupils, allowing them to perceive depth and color.
7. However, manta shrimp are not able to follow moving objects.
8. David Blaine, a magician, ate glass and survived due to the properties of stomach acid.
9. The human stomach produces about 2 liters of gastric juice per day, which contains hydrochloric acid.
10. Hydrochloric acid in the stomach can dissolve metals, wood, bones, and glass.
11. The human body has a unique feature called dermographism, where the skin changes color when slightly irritated.
12. Dermographism can be used as a symptom in diagnosing certain diseases, such as severe poisoning or meningitis.
13. Static electricity is a property of the human body that can be demonstrated by rubbing a balloon against hair and sticking it to a wall.
14. Some people have a condition called "dermographism" that causes their skin to react to slight irritations.
15. The human body has pressure points that can be used to relieve stress, such as the philtrum between the nose and upper lip.
16. Massaging certain points on the body, such as the palms and the back of the head, can relieve stress and improve concentration.
17. The human body is unable to produce vitamin C, which is essential for health.
18. Scurvy, a disease caused by a lack of vitamin C, was a major cause of death at sea in the 17th and 18th centuries.
19. It's estimated that between 1600 and 1800, about 1 million sailors died from scurvy.
20. Chlorine in swimming pools can react with organic compounds to form chloramine, which gives off a strong smell.
21. This smell can indicate that someone has urinated in the pool.
22. It's not safe to swallow water from a swimming pool, as it can contain bacteria like E. coli.
23. Cracking one's knuckles is not necessarily harmful, but it can be annoying to others.
24. Synovial fluid in joints acts as a lubricant and can form bubbles that burst, causing the cracking sound.
25. A man named Donald Unger cracked his fingers on one hand for 60 years to test the effects, and found no negative consequences.