Thomas Edison had a tatoo of 5 dots (like on a dice) on his left forearm

According to a 1911 policy with the Mutual Life Insurance Company of New York, Edison had five dots tattooed on his left forearm. No one knew what the dots meant.

Interestingly, Edison was credited for inventing the basic tattoo machine. In 1876, he patented the Stencil-Pens, an engraving device that many years later was modified by Samuel O’Reilly to make the world’s first tattoo machine.

Though it would’ve been a neat thing, there was simply no evidence that Edison used his invention to give himself a tattoo.

The only reason the faces of four presidents were carved in the rock is because of the tourism it would generate.

Originally known to the Lakota Sioux as Six Grandfathers, the mountain was renamed after Charles E. Rushmore, a prominent New York lawyer, during an expedition in 1885. At first, the project of carving Rushmore was undertaken to increase tourism in the Black Hills region of South Dakota. After long negotiations involving a Congressional delegation and President Calvin Coolidge, the project received Congressional approval. The carving started in 1927, and ended in 1941 with some injuries and no fatalities.

The name of the Michelin man is Bibendum (it is latin for something like "time to drink")

The 1898 poster showed him offering the toast Nunc est bibendum ("Cheers!" or "Now is the time to drink" in Latin), to his scrawny competitors with a glass full of road hazards, with the title and the tag C'est à dire: À votre santé. Le pneu Michelin boit l'obstacle ("That is to say, to your health: The Michelin tyre drinks up obstacles"). It is unclear when the word "Bibendum" came to be the name of the character himself. At the latest, it was in 1908, when Michelin commissioned Curnonsky to write a newspaper column signed "Bibendum".