Enamel is hardest substance in the human body.
61
Early American humans hunted car-size armadillos and used their shells for houses.
12
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Tigers can see 6 times better at night than humans.
305
If the human eye was a digital camera, it would have 576 megapixels.
25
Human hair and fingernails continue to grow after death.
7
Poor eyesight (myopia) is associated with higher IQ.
232
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346