First described by neurologist Constantin von Economo in 1917, encephalitis lethargica infected more than 1 million people — and killed an estimated 500,000.

Recent excavations on Hatteras Island may have just uncovered the "smoking gun" that reveals what happened to the Roanoke settlers and finally brings the mystery of the "Lost Colony" to a close.

It is widely accepted that modern soccer first emerged in England in the mid-19th century, but new evidence from an old Scottish farm suggests the sport was being played regularly in the area more than 200 years earlier.

These swords were forged via a distinctive process of blending various types of iron and then folding them together into delicate patterns, a method that created uniquely beautiful blades and has never been seen anywhere else in history.

Purchased for just $27.50, this document was believed to be a mere replica, but a medieval history professor searching Harvard's archives recently determined that it's actually an original Magna Carta issued by King Edward I.

Animal bone tubes uncovered at Chavín de Huántar were found to contain a mix of nicotine and vilca residue, a combination that would have produced terrifying and profound visions for those who snorted it some 2,800 years ago.

John Allen Chau spent years preparing to travel to North Sentinel Island and convert the isolated tribespeople who live there to Christianity — but shortly after he stepped ashore on November 16, 2018, he was killed by the Sentinelese.

This "bone collector" caterpillar is found only in a six-square-mile area on the Hawaiian island of Oahu.

Oscar Zeta Acosta made a name for himself as an unconventional lawyer, a radical activist, and a drug-blitzed traveler before he mysteriously vanished in Mexico in 1974.

The Koning Willem de Tweede had just completed a journey from Hong Kong to South Australia, when a storm struck and caused it to wreck off the coast of Long Beach.