The average sperm cell swims at 8 inches per hour.
4
Every human spent about half an hour as a single cell.
144
Poor eyesight (myopia) is associated with higher IQ.
232
Human hair and fingernails continue to grow after death.
7
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15