In Summer, the non-stop sunlight fires an unrelenting thaw, transforming much of the polar regions into fertile land and open sea, while immense masses of melted sweet wa ...

The polar caps have the most extreme seasonal contrasts, growing and melting vast ice masses, so wildlife adapts by annual migrations. The majority of Antartica is a vast ...

Mountains are the most prominent products of the immense forces which shape the living planet: tectonic drift, volcanic activity and erosion by wind, water, frost and pre ...