Early American humans hunted car-size armadillos and used their shells for houses.
12
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Human hair and fingernails continue to grow after death.
7
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
Your thumb is about the same size as your nose.
124
Mushrooms are more closely related to humans than they are to plants.
47