Early American humans hunted car-size armadillos and used their shells for houses.
12
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
The human sigh acts as a physiological reset button.
23
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
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23