12-03-23 An odd, previously unseen landform could provide a window into the geological history of Mars, according to new research by University of Washington geologists. They call the structures periodic bedrock ridges. The ridges look like sand dunes（沙丘...

11-12-11 An unusually hot melting season in 2010 accelerated ice loss in southern Greenland by 100 billion tons -- and large portions of the island's bedrock rose an additional quarter of an inch in response. That's the finding from a network of nearly 50 GP...