After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
The average sperm cell swims at 8 inches per hour.
4
The world's shortest man measures only 21.5 inches.
73
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
In one day, adult lungs move about 10,000 litres of air.
11
Pain occurs when sounds are above 130 db.
124
Early American humans hunted car-size armadillos and used their shells for houses.
12