Early American humans hunted car-size armadillos and used their shells for houses.
12
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Yawns are more contagious among people with closer relationships.
163
It takes approximately 12 hours for food to entirely digest.
93
A human being loses an average of 40 to 100 strands of hair a day.
133
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34