In December of 1980, a 19-year-old girl named Jean Hillier crashed her car while on the way to a friend’s house in rural Minnesota. She tried walking the remaining two miles, but the frigid temperatures stopped her. She was found frozen solid the next morning, and her heart rate had dropped to 12 beats per minute.

Miraculously, she made a full recovery, and doctors were baffled as to how she survived the ordeal.