A small, delayed avalanche may have been responsible for the Dyatlov Incident
The actual scientific paper: https://www.nature.com/articles/s43247-020-00081-8/Still no explanation about the "numerous unexplained observations. While hypothermia was determined to be the main cause of death, four hikers had severe thorax or skull injuries, two were found with missing eyes and one without tongue; some were almost naked and barefoot, traces of radioactivity were found on some of their clothes, and signs of glowing orange spheres floating in the sky were reported that night"