Only humans shed emotional tears.
331
Early American humans hunted car-size armadillos and used their shells for houses.
12
Tigers can see 6 times better at night than humans.
305
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
By weight, Bone is five times stronger than steel.
417
The human eye blinks an average of 4,200,000 times a year.
233