Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
On average, there's 100 billion neurons in the human brain.
83
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Tigers can see 6 times better at night than humans.
305
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Your fingernails grow faster in summer.
744
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
Human hair and fingernails continue to grow after death.
7