You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Your heart will pump about 212 million liters in its lifetime.
26
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
The average sperm cell swims at 8 inches per hour.
76
There's 100 trillion good bacteria living in your body.
17