Meet Marcel Petiot, the French doctor who promised Jews safe passage from Nazis, only to rob and murder them.

The end of civilization as we know it might not start with a bang — but rather a sneeze.

See why the mysterious murder of Mary Pinchot Meyer, JFK's bombshell, CIA-affiliated mistress have fascinated sleuths for decades.

The problematic sexual history of the supposedly progressive rock star.

Three days after the devastation of Hiroshima, U.S. forces carried out the atomic bombing of Nagasaki on August 9, 1945. The attack killed 70,000 in an instant and remains fiercely debated to this day.

Learn about the real-life tragedy of Charley Ross that inspired the phrase "Don't take candy from strangers."

Decades after the HIV/AIDS crisis, a partial ban still makes it effectively prohibitive for gay men to donate blood.

Before federal food safety regulations really existed in the U.S., one man made it his duty to prove that food additives were harmful to human health -- and he did so in a rather unconventional way.

We tend to think that humans can have the most disruptive impact on the planet. As these volcanic eruptions show, that's really not the case.

As interest in travel beyond our atmosphere continues to grow, what happens when you're in need of surgery in space, miles above the Earth?