Nine experienced cross-country skiers hurriedly left their tent on a Urals slope in the middle of the night at around -30 degrees Celsius, casting aside skis, food, boots and most of their clothes. Soon they would be dead, many of them with unexplained physical injuries more suited to car crash victims, and dosed with radiation. Their deaths are still unexplained, 49 years later. The Dyatlov Pass Mystery. more inside