The first ichthyosaur fossil was discovered around 1818 and was thought lost after World War II, but researchers have found two casts in the United States and Germany.

Condemned as a traitor to the English king in August 1305, William Wallace faced a torturous execution that was considered gruesome even by medieval standards.

By mapping out how the Walsh glacier had moved over the past eight decades, the expedition was able to pinpoint where explorers had abandoned their equipment, including cameras.

Now on display in the British Museum, the Rosetta Stone is a granite tablet from 196 B.C.E. inscribed with a decree in Egyptian hieroglyphics, ancient Greek, and Demotic script.

Leah, Kate, and Maggie Fox carried out an elaborate prank for 40 years, convincing audiences that they could communicate with spirits.

Known as the "father of photojournalism," Mathew Brady helped take 10,000 pictures of the Civil War — and captured the reality of America's bloodiest conflict.

John Barber died of tuberculosis in 19th-century Connecticut, and when townspeople remained sick thereafter, superstitious locals claimed he was a vampire who rose from the grave to spread his illness.

Whether it was serial killers prowling the streets or parents killing their children in their own homes, these are some of the most disturbing murders ever committed on Halloween.

On January 31, 1976, Marie Elizabeth Spannhake vanished near her home in Chico, California — but it wasn't until 1984 that a woman named Janice Hooker claimed that her husband Cameron had abducted and murdered Spannhake eight years before.

Elisabeth R. and her cohorts allegedly believe that the Treaty of Versailles is invalid and that Germany is still a monarchy.

From a 19-year-old who stabbed his landlord because the "devil made him do it" to the woman who underwent a series of exorcisms across 23 days, these are nine of the most harrowing cases of alleged demonic possession in history.