We share 70% of our DNA with a slug.
218
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
You can't tickle yourself.
29
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
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69