Those stars and colours you see when you rub your eyes are called phosphenes. See more

The rat has been called the world’s most destructive mammal - other than man. See more

Hershey's Kisses are called that because the machine that makes them looks like it's kissing the conveyor belt. See more

A shark is the only fish that can blink with both eyes. See more

Fish that live more than 800 meters below the ocean surface don't have eyes. See more

A group of crows is called a murder. See more

Turkeys can reproduce without having sex. It's called parthenogenesis. See more

A tuna called the 'Blue Fin' can be sold for over $20,000 around the world. See more

You cannot sneeze with your eyes open. See more

Our eyes are always the same size from birth, but our nose and ears never stop growing. See more

You will have to walk 80 kilometers for your legs to equal the amount of exercise your eyes get daily. See more