Human hair and fingernails continue to grow after death.
7
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
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
Only humans shed emotional tears.
331
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
By weight, Bone is five times stronger than steel.
417