It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
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
Only humans shed emotional tears.
331
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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