Directorios

Enlace: http://www.pbs.org/wgbh/nova/avalanche/

Descripción: PBS NOVA Online.
«Avalanches are a significant mountain hazard -- responsible for more deaths each year in the United States than earthquakes. Once in motion, snow slides are a powerful force of nature, capable of snapping off mature trees like match sticks, and easily destroying buildings. And when an avalanche finally stops, the snow sets up like concrete, making rescue efforts extremely difficult, and chances for survival slim.»