These 20 serial killers let us know why they killed — but we'll never know just how to unread what they said.

Discover the 12,000-year history of irezumi, the ancient form of Japanese body art widely seen as a Yakuza tattoo tradition today.

With as many as 20 million dead, China suffered more casualties during World War II than any other country except the Soviet Union.

In the final battle of the English Civil War, King Richard III faced off against the rival for his throne, Henry Tudor, in harrowing man-to-man combat.

Whether Odin, Frigg, Thor, Balder, or Freyja, these Norse gods boast tales that are far more outrageous than you ever realized.

Discover the true story of Clint Eastwood's "The Mule" with this look at Leo Sharp, an 87-year-old drug trafficker for the Sinaloa Cartel.

Award-winning correspondent Marie Colvin gave an eye to tell the truth on the Sri Lankan Civil War, and when civil war broke out in Syria, she gave her life.

Don Shirley was a piano prodigy and his passion was for classical music. But because of his race, 1950s America wanted him to stick to pop music.

In 1923, Dr. John Brinkley broadcast that he had found a cure-all for impotence and insanity alike in goat testicles — until it was discovered that he was, in fact, a quack.

For four months the hills of L.A. were littered with the bodies of women and girls aged 12 to 28. It was the work of two insatiable killers, though they were recognized as a single monster one and the same: the Hillside Strangler.

Luka Magnotta filmed himself murdering Lin Jun, then shared the video online. "It just gave me this weird energy," he later said. "Something just happened in my brain."