An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Your heart will pump about 212 million liters in its lifetime.
26
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
The human sigh acts as a physiological reset button.
23
Your thumb is about the same size as your nose.
124
Gorillas can catch human colds and other illnesses.
205