When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
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 takes about 20 seconds for a red blood cell to circle the whole body.
102
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
You forget 90% of your dreams.
256