After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
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
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The average sperm cell swims at 8 inches per hour.
76
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12