In 1959, 9 hikers died on Russia's Dyatlov Pass under mysterious circumstances. 67 years later, many theories exist, but the case still sparks debate worldwide

On a freezing night in February 1959, nine experienced hikers disappeared from their tent in the northern Ural Mountains. They were part of a skiing expedition led by Igor Dyatlov. When rescuers finally reached the site, the scene raised more questions than answers. The tent had been cut from the inside, and the hikers had fled into temperatures that fell below −25°C.