The average human body contains enough iron to make a small nail.
50
A person can live without food for about a month, but only about a week without water.
156
Only 1 person in 2 billion will live to be 116.
49
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130