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
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
If your DNA was stretched out it would reach to the moon 6,000 times.
256
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The world's shortest man measures only 21.5 inches.
73