Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
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.
35
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515