Nine experienced cross-country skiers hurriedly left their tent on a Urals slope in the middle of the night at around -30 degrees Celsius for no obvious reason, casting aside skis, food, boots and most of their clothes. Soon they would be dead, some with injuries more suited to car crash victims, and apparently dosed with radiation. Their deaths are still unexplained, 49 years later. The Mystery of the Dyatlov Pass Accident. [more inside]
posted by Henry C. Mabuse on Feb 22, 2008 - 122 comments

Unmasking D.B. Cooper: On a rainy night in 1971, the notorious skyjacker jumped out of a 727 and into American legend. But a chance lead to a Manhattan P.I. may have finally cracked the case, despite the fact this isn't the first time someone has claimed to be D.B. Cooper.
posted by fandango_matt on Oct 31, 2007 - 27 comments

... the eighth young man since 1997 was found dead in the Mississippi River in the La Crosse [Wisconsin] area on Monday.
posted by anjamu on Oct 2, 2006 - 37 comments

Famous Unsolved Codes and Ciphers
posted by anastasiav on May 18, 2004 - 13 comments