It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The human body contains over a billion miles of DNA.
147
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The average person will go on a date at least 100 times before they finally marry.
33
The world's shortest man measures only 21.5 inches.
73
Your heart will pump about 212 million liters in its lifetime.
26