The segmented invertebrates known as tardigrades may be microscopic, but these indestructible "water bears" are planet Earth's most resilient creatures.

Lynette Fromme became a Manson family member as a homeless teenager — and eventually tried to kill President Gerald Ford in 1975.

Though Frederick Valentich vanished almost 40 years ago, his unexplained disappearance still captures the attention of UFO hunters.

On April Fools’ Day 1957, BBC viewers watched a program about a "spaghetti tree" in Switzerland, and many were so convinced it was real that they wanted to grow their own.

The 1921 Tulsa Massacre left hundreds dead and caused over $1.5 million in damage while the city's famed "Black Wall Street" was destroyed — in just 24 hours.

The creepy story of Robert the Doll began when he was gifted to a young boy named Robert Eugene Otto in 1904 — and he's brought horror to Key West ever since.

A private campground in Monte Rio, California, Bohemian Grove hosts an all-male social club of rich and powerful members who want to "misbehave."

While studying nursing at UMass Amherst in February 2004, Maura Murray crashed her car in rural New Hampshire — then inexplicably disappeared forever.

Authorities found a map in Robert Hansen's Anchorage home marked with tiny "X" symbols, showing where the so-called "Butcher Baker" killed and buried his victims in the wilderness.

King Ludwig II of Bavaria spent years dreaming up Germany's Neuschwanstein Castle, the model Walt Disney would later use for "Sleeping Beauty."

Though ibogaine has helped some people who are addicted to opioids, the drug remains controversial — and illegal in the United States.