תפריט כתבה
Why some Alaskan rock glaciers race downhill while their neighbors barely move
Phys
19:20
Two massive rock glaciers are creeping down mountain valleys in Alaska's Wrangell–St. Elias National Park. They sit only a few miles apart and formed under the same sky. One moves more than 5 feet (1.5 meters) a year. The other moves at less than half that pace.
