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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
![A cast of LB1 (left) was compared to several microcephalic skulls, amongst which is that of the micr](https://biology-forums.com/gallery/47/medium_27581_22_04_12_5_16_28.jpeg)
![Comparison of the chemical structures of psilocybin and LSD. Psilocybin (left) is derived from a mus](https://biology-forums.com/gallery/47/medium_46687_17_12_14_12_27_14_19605951.jpeg)