In the 1960s, a group of Russian college students went for a backcountry trip in the Ural Mountains. When their bodies were discovered a few weeks later, they were in various states of undress, spread out over a few hundred yards, mutilated (tongue and eyes cut out) and ... wait for it ... radioactive!
Did American spies murder them? Was the Russian army covering up a secret military base? Was it a yeti? Aliens? Hundreds of theories emerged over the years, but it looks like they finally figured it out and the answer is ... well you just have to read to find out!