Your fingernails grow faster in summer.
744
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Gorillas can catch human colds and other illnesses.
205
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
A man's beard grows fastest when he anticipates sex.
239
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Your thumb is about the same size as your nose.
124
In one day, adult lungs move about 10,000 litres of air.
11