Every human spent about half an hour as a single cell.
144
Only humans shed emotional tears.
331
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
A person can live without food for about a month, but only about a week without water.
156
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
Your fingernails grow faster in summer.
744
Early American humans hunted car-size armadillos and used their shells for houses.
12