Yet much about the landscape under the ice has been uncertain, because ground and air surveys are difficult in the region.

The team used satellite imagery, computer modeling, and an array of different methods to map the ice sheets and glacial flows ...

The UK's plan to help develop a missile with Ukraine is not a "step" towards peace, warns Russia - which began the conflict ...

President Trump has repeatedly threatened to invoke the rarely used federal law to deploy the US military for domestic law ...

A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating ...