Your thumb is about the same size as your nose.
124
The human sigh acts as a physiological reset button.
23
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Gorillas can catch human colds and other illnesses.
205
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
Your fingernails grow faster in summer.
744