The human brain doesn't stop developing until about 25 years old.
102
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
Human hair and fingernails continue to grow after death.
7
Phobatrivaphobia is fear of trivia about phobias.
39
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
Your heart rate can rise as much as 30% during a yawn.
69
The average sperm cell swims at 8 inches per hour.
4
When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.
30