Animal Eyes

Back in the 1800s, the game ‘euchre’ was actually the most popular card game in the world. In fact, it was this game that introduced the joker into modern decks!

Hundreds of years ago, Robert Hooke published a book called Micrographia that included hand-drawn images of samples observed under a microscope! Hooke, who we mentioned in a previous fact, is often credited as the discoverer of cells, after studying cork under the microscope.

The recognizable ‘Jeopardy!’ theme song was created by Merv Griffin, who claims the song only took 30 seconds to write. The song was originally written as a lullaby to help Griffin's son fall asleep, hence the gentle lilt to the melody. Since airing on TV, the song has become an ear-worm.