For centuries, humans have wondered if they are alone in the universe. In the early 20th century, the US government set out to figure it out once and for all.

Hans Albert became a scientist in his own right and a professor in hydraulic engineering, a career his father initially dubbed "a disgusting idea."

In a time when the women's suffrage movement relied on patience and polite speeches, Emmeline Pankhurst paved her own path with action.

On September 6, 1949, Howard Unruh killed 13 people in 12 minutes. If he'd had enough bullets, he later said, he would have "killed a thousand."

In the summer of 1960, four teenagers set out for sweetheart's retreat by the shore of Finland's Lake Bodom. Only one would return and 40 years later, become a suspect in the murder of his three friends.

The song describes a despondent and isolated teenage boy. But who was Jeremy Delle, the 15-year-old behind the hit single "Jeremy?"

In March, the snapping turtle was euthanized. By June, the teacher Robert Crosland faced charges of animal cruelty for which the jury acquitted him.

These fearless combat engineers descended into the complex Viet Cong tunnels to gather info and disarm bombs — often at the cost of their own lives.

In the midst of the Austro-Turkish War, the Austrians engaged in a deadly battle in the town of Karansebes — against itself — all because of one bottle too many of Schnapps.

Luftwaffe fighter pilot Hans-Joachim Marseille may have racked up 100 aerial victories during World War II, but that didn't stop him from mocking his Nazi overlords.

Wild West outlaw Billy the Kid died in 1881 — or did he escape, vanish, and live on under the name Brushy Bill Roberts in Texas all the way until 1950?