If the human eye was a digital camera, it would have 576 megapixels.
25
Early American humans hunted car-size armadillos and used their shells for houses.
12
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The world's shortest man measures only 21.5 inches.
73
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29