Enamel is hardest substance in the human body.
61
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
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
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
The average sperm cell swims at 8 inches per hour.
76
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55