Animals such as arctic hares and foxes change their summer coats to white in the winter. Explore five animals that go white ...

This 2012 satellite photo shows a quartet of near-identical glaciers on Canada's Ellesmere Island. The ice masses help to spark life in the otherwise barren Arctic environment.

Mountain hares - a sister species to the Arctic hare - died out in England during the last ice age. "Reintroduction attempts were made in the late 1800s, and while most were unsuccessful ...