It is impossible for a human to lick their elbow. See more

It takes about 20 seconds for a red blood cell to circle the whole body. See more

Like fingerprints, everyone's tongue print is different. See more

The cigarette lighter was invented before the match. See more

Human thigh bones are stronger than concrete. See more

Coca-Cola was originally green. See more

Maine is the only state in the US whose name is just one syllable. See more

The very first Olympic race, held in 776 BC, was won by Corubus, a chef. See more

The only 15 letter word that can be spelled without repeating a letter is "uncopyrightable". See more