Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Yawns are more contagious among people with closer relationships.
163
The human brain uses approximately as much energy as a 10 watt light bulb.
120
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Mushrooms are more closely related to humans than they are to plants.
47
Your thumb is about the same size as your nose.
124
Early American humans hunted car-size armadillos and used their shells for houses.
12