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
If the human eye was a digital camera, it would have 576 megapixels.
25
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Your fingernails grow faster in summer.
744
You forget 90% of your dreams.
256
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
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24