|
|
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
![Because of the hazards of a vacuum, astronauts must wear a pressurized space suit while outside thei](https://biology-forums.com/gallery/47/medium_12359_17_05_12_12_46_44.jpeg)
![Space-filling model of an actin filament (shades of red) with one myosin head (gray and two shades o](https://biology-forums.com/gallery/47/medium_9828_12_01_13_11_13_18.jpeg)