If your DNA was stretched out it would reach to the moon 6,000 times.
256
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Tigers can see 6 times better at night than humans.
305
Only humans shed emotional tears.
331
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29