The human brain doesn't stop developing until about 25 years old.
102
Early American humans hunted car-size armadillos and used their shells for houses.
12
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
The human brain is more active during sleep than during the day.
28
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The human eye blinks an average of 4,200,000 times a year.
233
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266