His success was front-page news around the world. But then disaster struck. Special photography, including infrared photography, exposes the secret life of the wolf pack. Viewers are sidewalk supervisors for one of the most unusual construction projects in the U.S. - the building of the stunningly beautiful and eminently practical Clark Bridge over the Mississippi River. Close inspection of submerged ruins reveals some monumental archaeological surprises.
Avalanches are an escalating peril as skiers and snowmobilers push the limits into the back country.
NOVA witnesses scientists getting buried alive in their attempts to understand these forces of nature.