What is the coolest biology fact you have ever heard?

Question

What is the coolest biology fact you have ever heard?

Answer 1

All terrestrial life forms developed from common ancestors through the process of natural selection.  That is the most important fact of biology.

Answer 2

The human eye blinks an average of 4,200,000 times each year.

The shark has to keep moving to stay alive.

Elephants can hear through their feet.

There are more insects in a single square mile of fertile soil than there are people on the entire earth.

The acceleration rate of a flea's jump is 20 times that of a space shuttle during launch.

Answer 3

Check out: No, really do!

http://www.pctechnician.com/biology.html

I liked: A pig's o****m lasts for 30 minutes!

Polar bears have black skin