There are about 1,400 different species of bacteria in your belly button.
10
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Within three days of death, the enzymes that once digested your food begin to eat you.
22
A person can live without food for about a month, but only about a week without water.
156
Your thumb is about the same size as your nose.
124
