BedMachine/UCI/BAS Denman's deep trough (dark blue) is 20km wide and 100km ... NASA/USGS/Landsat Byrd Glacier is a giant ice stream that cuts through the Transantarctic Mountains Much of what ...

"The change of seasons causes surface melting far inland from the coastal ice front," glaciologist Christopher Shuman said.

They could also, until recently, walk across miles of pristine blue glacier. Now the ice is broken up by rock, mud, and puddles. The change is dramatic. "When we constructed this chairlift we had ...