Science Why is NASA flying planes over Alaska?

A trio of NASA missions are using turboprop aircraft to examine changes in Arctic sea ice, glaciers, and permafrost.

By , LiveScience Senior Writer

Chris Larsen, University of Alaska, Fairbanks

A speedy trip across Alaska's vast, roadless tundra and tall mountains requires travel by air. The state has more private planes for each of its residents than any other state in the union.