100 Weird Facts That Are Strange But True

All scorpions glow.

Frowning burns more calories than smiling.

More energy from the sun hits Earth every hour than the planet uses in a year.

Only female mosquitoes bite.

Penguins have an organ above their eyes that converts seawater to fresh water.

A duck has three eyelids.

Before mercury, brandy was used to fill thermometers.

You would weigh less on the top of a mountain than at sea level.

The infinity sign is called a lemniscate.

Dragonflies capture their prey 95% of the time, making them one of the most efficient predators in nature.