The Arthurian legends of medieval Europe recount the adventures of the fabled King Arthur and his Knights of the Round Table, from Sir Lancelot to Mordred — but these protectors of Camelot weren't always as chivalrous as they seemed.

Standing just 1 foot, 9.5 inches tall, Chandra Bahadur Dangi was the shortest man to ever live. After he was honored by Guinness World Records in 2012, the Nepalese farmer fulfilled his lifelong dream of traveling the globe.

After striking the Gulf Coast of the United States in August 2005, Hurricane Katrina caused 1,392 deaths and an estimated $125 billion in damage.

On March 8, 2014, Malaysia Airlines Flight 370 mysteriously vanished while traveling from Kuala Lumpur to Beijing — and it's still unclear what caused the plane's disappearance.

The ancient city of Canopus was known for "all sorts of licentious behavior" before it sank beneath the Bay of Abū Qīr off the coast of Alexandria in the eighth century C.E.

By injecting phosphor particles into succulents and exposing the leaves to sunlight or LED light, the researchers made the plants glow for up to two hours.

Originally built as army barracks during the Cold War, Begich Towers is now home to almost all 272 residents of Whittier, Alaska, a remote outpost near the Passage Canal.

While out on a routine patrol in Thailand's Phu Khat Wildlife Sanctuary, rangers recently happened upon a mysterious mountain cave known as Ta Kueng that's covered with ancient rock art that predates the region's recorded history.

The Cicada 3301 puzzles started to appear on 4chan in 2012, claiming to be a test to find "highly intelligent individuals" — but no one knows who posted these puzzles or why.

Michelle Philpots starts each day with no memory of the day before, the result of a rare variety of amnesia which helped inspire the 2004 film "50 First Dates."