The human sigh acts as a physiological reset button.
23
Your fingernails grow faster in summer.
744
Human hair and fingernails continue to grow after death.
7
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
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Every human spent about half an hour as a single cell.
144
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456