He played a pivotal role in the invention of the modern lightbulb and telephone, and he was the only Black member of Thomas Edison's elite research team. But who was Lewis Latimer?

Born around 1475 as Pope Alexander VI's illegitimate son, Cesare Borgia was a notorious noble, cardinal, and soldier who died brutally in 1507.

A catastrophic collapse of coal waste, the Aberfan disaster engulfed a small Welsh town in 1966, killing 116 children and 28 adults.

After the Munich Massacre of 1972, Israel's intelligence agency Mossad launched a top-secret assassination campaign against the militants involved — but it all unraveled when they killed an innocent man.

When a Confederate colonel called John Clem a "damned little Yankee devil" and demanded his surrender at the Battle of Chickamauga, John shot him — and became the youngest noncommissioned officer in U.S. Army history.

In December 1900, the keepers of the Flannan Isles Lighthouse off the northwest coast of Scotland mysteriously disappeared — and to this day, no one knows what happened.

Step inside Marilyn Monroe's house, the Spanish Colonial at 12305 Fifth Helena Drive in Brentwood, California where she spent her last days before dying in 1962.

Starting in the late 1970s, the anonymous Circleville letters were sent to hundreds of residents, local businesses, government offices, and others, threatening to reveal the recipients' darkest secrets — or worse.

At the start of the 1983 Sydney to Melbourne Ultramarathon, Cliff Young quickly fell behind and seemed on track to finish last. But while the others stopped to sleep, Young kept running at his tortoise pace for five days straight — and won.

Between 1948 and 1975, the U.S. Army tested chemical weapons like mustard gas and LSD on American soldiers at Maryland's Edgewood Arsenal facility.

The mistake wasn't uncovered until nearly 50 years later when the now-adult Paul Fronczak decided to take a DNA test and discovered he wasn't related to his mom or dad.