When a group of immigrants set out across the desert, the results helped researcher create the Death Index, a new model for dehydration.

Pablo Valencia spent six days wandering the 110-degree desert before stumbling into McGee's camp. He shouldn't have been alive, but he was.

The bizarre science behind Phil Broscovak's lightning strike, and his incredible journey of recovery

A remote car accident, a broken ski, a tumble in the snow, and a slow descent into hypothermia before (spoiler alert!) a dramatic rescue