In one day, adult lungs move about 10,000 litres of air.
11
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
The human brain doesn't stop developing until about 25 years old.
102
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
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
The average sperm cell swims at 8 inches per hour.
76
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22