The average person's skin weighs twice as much as their brain.
131
Our brains have a negativity bias and will remember bad memories more than good ones.
15
A person can live without food for about a month, but only about a week without water.
156
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
It takes about 20 seconds for a red blood cell to circle the whole body.
102
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
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
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139