The average sperm cell swims at 8 inches per hour.
4
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
A person can live without food for about a month, but only about a week without water.
156
Our Right Lungs takes more air than our left lung.
194
Only humans shed emotional tears.
331
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
The human eye blinks an average of 4,200,000 times a year.
233
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21