The cause of death for Mary Reeser has still never been confirmed, but speculation has it that she died of spontaneous human combustion.

Yale psychologist Stanley Milgram conducted a groundbreaking experiment to test the bounds of human nature, changing the way we think about authority forever. The device he used is now stored inside Ohio’s Center for the History of Psychology in Akron.

For his shocking experiment, Milgram used a simple box with a few knobs, dials and buttons. Although the device was not really hooked up to another human, the study confirmed that most people were willing to obey a higher authority, even if it meant harming someone in the process.

The Lubec Historical Society in Maine contains an oversized gold accumulator -- an iron pot with metal rods that once held the promise of unimaginable wealth.

The Electrolytic Marine Salts Corporation was developed by 2 men who claimed to have the key to collecting gold from the ocean in Lubec, ME.

The Autry Museum in Los Angeles plays home to a unique artifact that belonged to the poetic criminal known as "Black Bart." He robbed stagecoach after stagecoach, but never fired his weapon and always left a poem behind.

The shotgun wielded by the unique bandit -- whose gentlemanly nature and prolific crime spree earned him one of the most unusual reputations in the history of the American West -- sits on display in LA.

The capital city of Columbus, OH, is home to the Martin Baseball Museum, which has in its collection a rather unassuming piece of equipment.

This early baseball mitt is linked to a determined pitcher, Arthur "Candy" Cummings, and his ex-war-hero catcher, Nat Hicks, whose revolutionary idea for the curveball marked a historic turning point in America’s national pastime.

The Neville Public Museum of Brown County in Green Bay, WI, contains a small handkerchief that represents a fascinating story about one of the region’s most intriguing characters.

The handkerchief belonged to a man who claimed to be the son of Marie Antoinette and heir to the French throne.