George H. W. Bush was the first U.S. president to formally pardon a turkey, but the heartwarming tradition of sparing birds from the White House holiday table goes back much further than 1989.

Philip Zimbardo conducted the Stanford Prison Experiment to study the dynamics between inmates and prison guards — but it went infamously wrong after just six days.

After spending nearly two decades locked in a basement, Stefan Fritzl walked with a permanent stoop and suffered from several ailments caused by a lack of vitamin D because he had never seen the Sun.

Researchers have long theorized that agriculture was the main stepping stone toward civilization in ancient Mesoamerica — but this recent discovery in Belize might rewrite that history.

On the final day of the Battle of Gettysburg in July 1863, Robert E. Lee ordered 12,500 Confederate troops to rush into the center of the Union Army's front lines — and within an hour, 1,100 men were dead and 5,400 more were wounded or captured.

Though the Roman Empire did not extend into Ireland, this charred fig provides a clear sign that Roman culture and trade did make their way to the Emerald Isle.

The Daniel Morgan at Cowpens medal was made to honor the Revolutionary War general in 1789 and replaced in 1839 when the original was stolen in a bank heist.

Coined by Mark Twain, the term "Gilded Age" described the glittering yet corrupt era that defined turn-of-the-century America.

This remarkably well-preserved specimen is the first mummy of a saber-toothed cat ever discovered, and it's providing groundbreaking insight into what the species actually looked like.

During Jack the Ripper's infamous crime spree in the autumn of 1888, the killer purportedly sent grisly letters to various journalists and officials taunting them about his murders — and one even included a human kidney.

The postcard, penned by first-class passenger Richard William Smith, was sent from Ireland during the ship's brief stop there on April 11, 1912 — just three days before it sank.