The Commodus Passage led directly to a private box in the Colosseum reserved for Roman emperors, but archaeologists aren't yet sure where it began.

Researchers studying these abandoned, centuries-old nests in Spain found a wealth of other human-made objects, including baskets, a crossbow bolt, a wooden lance, and a slingshot.

During the Russian Revolution in 1918, Ossip Bernstein was sentenced to die by firing squad, but at the last minute was offered a chance to play a game of chess to save his life.

A team of 18 researchers was able to move a life-sized replica of a moai statue over 300 feet in just 40 minutes using only ropes.

Art theft officers raided an exhibition in Parma and seized 21 lithographs purportedly made by Salvador Dalí to investigate their authenticity.

Carl McCunn went into the Alaskan wilderness in March 1981, hoping to spend a few months taking photos, but became stranded and ultimately died by suicide that December.

Just before she disappeared while taking a walk in Quebec City on February 17, 2008, Marilyn Bergeron told her parents that something horrible had happened to her and she felt unsafe — but she refused to elaborate.

Among the 5,000 artifacts found at the site near Horten, Norway, were stone tools, bone fragments, and the remnants of a prehistoric hut.

The gold brooch, jade stone, and bronze pin found at Troy date back to 2500 B.C.E. — 1,300 years before the legendary Trojan War.

Dimitrios Itsios was defending the Greek border when the Nazis invaded in April 1941, and he was able to slow down this much larger force despite having only a small contingent of men.