Within three days of death, the enzymes that once digested your food begin to eat you.
22
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
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
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
The average person's skin weighs twice as much as their brain.
131
The human brain doesn't stop developing until about 25 years old.
102