With depths of more than a mile, the 25-million-year-old Lake Baikal is the most voluminous freshwater lake on the planet — and it’s home to a variety of unique and mysterious creatures.

In the summer of 1518, the dancing plague in the Holy Roman city of Strasbourg saw some 400 people dance uncontrollably for weeks on end — leaving as many as 100 of them dead.

Beginning in the Late Middle Ages, Ottoman soldiers abducted children from Christian families and forced them into the Janissaries, one of the fiercest armies in history.

For decades, interracial relationships around the world were taboo and sometimes even illegal. Here's how these couples persevered despite their struggles.

Though Wayne Williams was convicted in two cases, who was behind the rest of the Atlanta murders that left at least 28 dead from 1979 to 1981?

Horseshoe crab blood has helped humans fight disease since the 1970s, but if we keep over-harvesting it, there may be none of these crabs left to save us.

In August 1955, Carolyn Bryant claimed that 14-year-old Emmett Till sexually harassed her — which led to his horrific lynching days later. But more than 60 years later, she finally admitted that her accusation was a lie.

While most people know her as a master chef, Julia Child also served as a spy for the Office of Strategic Services, where she collected and analyzed top-secret intelligence.

When the Eiffel Tower was built by Gustave Eiffel in 1889, it was designed to be the main attraction of the World's Fair — but most Parisians hated it.

When Rocky Dennis died at age 16, he had already lived more than twice as long as doctors expected — and lived a fuller life than anyone thought possible.

Dubbed the "Mexican Madonna" and the "Queen Of Tejano Music," Selena Quintanilla was a budding superstar — until she was gunned down in March 1995.