The glyptodon may seem like just a big armadillo, but it was the size of a car and could crush early humans with its clubbed tail.

Frito Bandito spent four years hawking corn chips to kids. Unfortunately, he embodied the worst of Mexican stereotypes.

No one could believe that mild-mannered Charlie Brandt had mutilated his wife and niece until they discovered his grisly past.

Chesty Puller has received the most medals of any Marine. He earned every one of them.

Karl Denke was an upstanding member of his community – until they realized he was turning humans into pickled pork, belts, and suspenders.

The sea is basically the Pacific version of the Bermuda Triangle, complete with mysterious disappearances, sea monster sightings, and ship sinkings.

Woodes Rogers made it his life's work, and risked his families fortune, to rid the world of pirates.

Moral of the story? Impress your students, they might name a mountain after you.

While beautiful, the Portuguese man of war packs a powerful venom that could give you severe muscle pain, make you vomit, or even kill you.

Keikaimalu, the world's first known surviving wolphin, was born to a male false killer whale and a female bottlenose dolphin.

Shah Jahan was a fearsome leader, but his obsession with opulence ultimately brought him down – as did his own sons.