After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Your heart will pump about 212 million liters in its lifetime.
26
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
The average sperm cell swims at 8 inches per hour.
76
Within three days of death, the enzymes that once digested your food begin to eat you.
22
There's 100 trillion good bacteria living in your body.
17