Snowmobiles long ago replaced dogsleds for hauling people and cargo in the polar regions, particularly in remote research stations and field camps such as those on the Greenland Ice Sheet and in Antarctica.

The Earth Institute at Columbia University-One of the planet's most remote and little-understood features may play a crucial role in transporting ice from the remote interior of Antarctica towards the surrounding ocean according to a new research.

Scientists have discovered a warehouse-sized drumlin - a mound of sediment and rock - actively forming and growing under the ice sheet in Antarctica. Its discovery, and the rate at which it was formed, sheds new light on ice-sheet behaviour. This could have implications for predicting how ice sheets contribute to sea-level rise. The results are published this week in the journal Geology.