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

Human thigh bones are stronger than concrete. See more

The cigarette lighter was invented before the match. See more

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

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

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

A teaspoon of neutron star material weighs about 110 million tons. See more

A boeing 747's wingspan is longer than the Wright brothers' first flight (120 feet/36 meters). See more

Lightning bolts can sometimes be hotter than the sun (about 50,000 ºF, 27,760 ºC). See more