Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Your thumb is about the same size as your nose.
124
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
The human body contains over a billion miles of DNA.
147