Early American humans hunted car-size armadillos and used their shells for houses.
12
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161