If you hold farts in during the day, they'll just come out when you sleep.
16
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
A human being loses an average of 40 to 100 strands of hair a day.
133
There are about 1,400 different species of bacteria in your belly button.
10
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
A person can live without food for about a month, but only about a week without water.
156
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17