Catastrophic and mesmerizing killers, avalanches are incredible forces of power and speed. This episode investigates two disaster avalanches that struck Everest in, resulting in a devastating number of casualties, and at a series of major avalanche incidents in the Alps. Experts weigh in on the causes of these steamrolling disasters, and survivors recall their harrowing experiences.

Catastrophic and mesmerizing killers, avalanches are incredible forces of power and speed. This episode investigates two disaster avalanches that struck Everest in, resulting in a devastating number of casualties, and at a series of major avalanche incidents in the Alps. Experts weigh in on the causes of these steamrolling disasters, and survivors recall their harrowing experiences.