Early American humans hunted car-size armadillos and used their shells for houses.
12
Your thumb is about the same size as your nose.
124
A person can live without food for about a month, but only about a week without water.
156
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
The average person's skin weighs twice as much as their brain.
131
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
