Pain occurs when sounds are above 130 db.
124
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
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
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human body contains over a billion miles of DNA.
147