The human brain doesn't stop developing until about 25 years old.
102
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
Your thumb is about the same size as your nose.
124
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
There are about 1,400 different species of bacteria in your belly button.
10
In 1996, research found that having excessive body hair is linked to higher intelligence.
23