Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The human sigh acts as a physiological reset button.
23
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Early American humans hunted car-size armadillos and used their shells for houses.
12
If the human eye was a digital camera, it would have 576 megapixels.
25
You forget 90% of your dreams.
256
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15