Physicists Harry Daghlian and Louis Slotin both suffered agonizing deaths after making minor slips of the hand while working on the plutonium orb known as the "demon core" at Los Alamos Laboratory in New Mexico.

The three human skulls from the Congo had once belonged to Belgian King Leopold II and bear inscriptions and jewels.

From cat burning to divorce by combat, these facts show exactly why the medieval period is known as the "Dark Ages."

Since being discovered in 1957, the "Boy In The Box" case baffled Philadelphia police. But thanks to genetic testing, the four-year-old victim has been revealed to be Joseph Augustus Zarelli.

Archaeologists believe that the vessel sank sometime in the 19th century when ships were as prevalent as "Amazon trucks."

For centuries, the only evidence historians had of the Roman Emperor Sponsian was this hoard of coins bearing his visage that were found in 1713, and many believed them to be fakes.

Tanner Lynn Horner, 31, confessed to abducting and killing seven-year-old Athena Strand after making a delivery at her Texas home.

Researchers say these owl carvings are simple enough to have been made by children and could have been used as toys, dolls, or amulets.

The proposal states that the robots would not be armed with guns and would only be used to "prevent further loss of innocent lives," while opponents are arguing against such militarization of the police.

From Herbert Hoover's mishandling of the Great Depression to George W. Bush's unpopular war in Iraq, go inside the stories of some of America's worst-ranking presidents.

The "zombie" viruses had been frozen for up to 48,500 years, but some showed signs that they were still infectious.