20th Century

Amid the bloodshed of World War I, the Pope pled for a truce on Christmas Day. The commanding powers refused the truce, but soldiers across Europe crossed battle lines to spend Christmas the enemy. Check out our HowStuffWorks article to learn more.

An inscription above King Tutankhamen's burial chamber reads: 'Death will come on swift pinions to those who disturb the rest of the Pharaoh.' This was known as the mummy's curse -- but was it fact, or fiction? Check out this HowStuffWorks podcast to lear

The D.B. Cooper mystery involves the case of Northwest Airlines Flight 305, which was hijacked by a lone man. Learn more about the D.B. Cooper mystery.