Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Early American humans hunted car-size armadillos and used their shells for houses.
12
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Babies crawl an average of 200m a day.
212
Poor eyesight (myopia) is associated with higher IQ.
232
The human brain is more active during sleep than during the day.
28