It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Every human spent about half an hour as a single cell.
144
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Your fingernails grow faster in summer.
744
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
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
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11