Yawns are more contagious among people with closer relationships.
163
We share 70% of our DNA with a slug.
218
There are about 255 babies born worldwide every minute.
46
The human eye blinks an average of 4,200,000 times a year.
233
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The world's shortest man measures only 21.5 inches.
73
Early American humans hunted car-size armadillos and used their shells for houses.
12