Early American humans hunted car-size armadillos and used their shells for houses.
12
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Yawns are more contagious among people with closer relationships.
163
Mushrooms are more closely related to humans than they are to plants.
47
Research has determined that most people are happiest at 7:26pm on a Saturday night.
70
The human sigh acts as a physiological reset button.
23