A person can live without food for about a month, but only about a week without water.
156
It takes approximately 12 hours for food to entirely digest.
93
Poor eyesight (myopia) is associated with higher IQ.
232
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
The average sperm cell swims at 8 inches per hour.
4
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Every human spent about half an hour as a single cell.
144
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