One human hair can support 3 ounces.
191
Our brains have a negativity bias and will remember bad memories more than good ones.
15
Enamel is hardest substance in the human body.
61
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
By weight, Bone is five times stronger than steel.
417
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24