An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
The human brain doesn't stop developing until about 25 years old.
102
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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There are about 1,400 different species of bacteria in your belly button.
10
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59