The Nile catfish swim upside down. See more

Typewriter, is one of the longest words that can be made using the letters on only one row of the keyboard. See more

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

Bubble gum and fairy floss were invented by dentists. See more

Every single "all a's" domain name, from a.com to aaa..aaa.com (63 a's) has been registered! See more

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

The cigarette lighter was invented before the match. See more

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

Lightning strikes about 6,000 times per minute on this planet. See more