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?

Found on remote New Zealand islands, the kakapo is a giant flightless parrot that has become critically endangered because of predation and human encroachment.

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.

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.

Although he was an Irish tailor for the Redcoats, Hercules Mulligan was also a secret member of the Sons of Liberty — and the perfect Patriot spy during the American Revolution.

From fighting poachers and outlaws to doing battle with Native American tribes, the Buffalo Soldiers of the Western frontier left behind a complex legacy.

Aspiring screenwriter Rey Rivera was just 32 years old when he disappeared on May 16, 2006. About a week later, he was found dead under strange circumstances at Baltimore's historic Belvedere Hotel — and the mystery remains unsolved to this day.

The day after the Tiananmen Square massacre, a lone protestor starred down a column of Chinese tanks in Beijing. His identity remains unknown, but the world knows him as the "Tank Man."