Known as the “Witch of Wall Street,” Hetty Green was one of the wealthiest people in the United States at the turn of the 20th century — but she was also one of the most miserly.

Paul Avery was a top reporter for the San Francisco Chronicle reporting on the infamous Zodiac killings. But after making a break in the case, the killer took to tormenting him with letters and cards.

Between 1977 and 1984, Cameron and Janice Hooker kept Colleen Stan inside a wooden box under their bed, only taking her out to torture her.

From 180 to 192 C.E., Emperor Commodus ruled ancient Rome with an insatiable lust for power that brought an end to the fabled Pax Romana.

In the early 14th century, Robert the Bruce became the King of Scots and ensured his country's independence after repulsing several English invasions.

After seven Braxton County, West Virginia residents reported seeing the Flatwoods Monster while investigating what looked like a UFO crash, local authorities scoured the scene — but they found nothing and reportedly "laughed off the reports as hysteria."

From Kenny the tiger to Otto the kitten, you've probably seen content about animals with Down syndrome. But what's the truth about their conditions?

In December 1982, Charles Scudder and his partner Joseph Odom were brutally murdered in their Corpsewood home by two acquaintances in a drug-fueled robbery gone awry.

According to Mexican legend, La Llorona is the ghost of a mother who killed her children — and causes grave misfortune to all near her.

Known as Snake Island, the viper-infested Ilha da Queimada Grande sits in the Atlantic Ocean about 90 miles off the coast of southeastern Brazil.

Jim Hutton and Freddie Mercury enjoyed seven love-filled years together before the latter died of AIDS-related complications on November 24, 1991.