Along with a history of racist wartime propaganda, other forms of hateful posters and political flyers were persistent throughout the 20th century. The infamous white supremacist group Ku Klux Klan ...

Philip Chism was just 14 when he murdered his 24-year-old math teacher Colleen Ritzer at Danvers High School before dumping her corpse behind the school.

In 1900, the lighthouse keepers on a remote Scottish island vanished. The official report called it an accident. But suspicious clues – and a puzzling logbook – point to a darker explanation.

First opened in 1970 and shut down in 2011, the Élan School was the "last resort" for parents of teens with behavioral problems — and allegedly a site of systemic abuse. For some, the idyllic woods of ...

Since 2011, investigators have considered every scenario regarding Phoenix Coldon's disappearance. From sex trafficking enslavement to purposefully running away — or being murdered.

Forty years before the British fought the Nazis, they used history's first concentration camps to commit genocide during the Boer War.

The Sea Peoples terrorized Egypt and the Mediterranean during the Bronze Age, but their identity and origins remain mysterious to this day.

Between 1971 and 1973, an unknown serial killer in Rochester, New York strangled three girls who had the same first and last initial in what’s known as the Alphabet Murders.

In celebration of the vast unknown of Earth's oceans, we present of our favorite fascinating and amazing facts about ocean animals!

According to centuries-old Mexican and Tejano folklore, La Lechuza is a bloodthirsty, shapeshifting owl with the face of an old witch known as a bruja.

The heart attack gun fired a dart made of frozen shellfish toxin that would enter the target's bloodstream and kill them in mere minutes without leaving a trace. In 1975, more than 30 years of almost ...

The man on trial was charged with molesting and strangling Marianne Bachmeier’s 7-year-old daughter, Anna.