A human being loses an average of 40 to 100 strands of hair a day.
133
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
