The human sigh acts as a physiological reset button.
23
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
A man's beard grows fastest when he anticipates sex.
239
Early American humans hunted car-size armadillos and used their shells for houses.
12
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
Poor eyesight (myopia) is associated with higher IQ.
232
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18