A man's beard grows fastest when he anticipates sex.
239
You can't tickle yourself.
29
We share 70% of our DNA with a slug.
218
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
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
