If your DNA was stretched out it would reach to the moon 6,000 times.
256
You can't tickle yourself.
29
We share 70% of our DNA with a slug.
218
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13