David and Louise Turpin abused their 13 children for years until one daughter managed to escape and alert police in January 2018.

Mary Sawyer claimed that a boy named John Roulstone wrote the classic nursery rhyme for her in 1816, but the real origin of "Mary Had A Little Lamb" is subject to intense debate — and has never been setted.

From a two-headed dog to attempts to raise the dead, these scientists performed some of the most deranged experiments of all time — often with horrific results.

These nocturnal poop collectors of Tudor-era England spent their time knee-deep in cesspits full of human excrement.

In the 1960s, Rhode Island built state Route 37 right over nearly 1,000 graves of people who had died at a nearby state institution for the poor, sick, and mentally ill.

Discovered in the British Museum in London, the ancient tablet shows a lonely male spirit being taken to the afterlife by a female companion.

The Notorious B.I.G. was at the height of his fame when he was murdered in Los Angeles in 1997. And to this day, no one knows who shot Biggie Smalls.

Homeowner Amanda Gee was not only friends with the family that was murdered there, but even had to clean up some of their blood before moving in.

Opium dens first sprung up in the Chinatown district of San Francisco in the 19th century. While they were eventually outlawed, these lounge-like establishments flourished across the West for close to a century.

Jeff Lowe used to work alongside "Tiger King" Joe Exotic at the G.W. Zoo, but then he took it over — and helped land Exotic in prison.

On May 3, 2007, three-year-old Madeleine McCann disappeared from her family's hotel room while on vacation in Praia da Luz, Portugal — and the case remains unsolved to this day.