It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Pain occurs when sounds are above 130 db.
124
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
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
On average, there's 100 billion neurons in the human brain.
83
If your DNA was stretched out it would reach to the moon 6,000 times.
256
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198