Enormous blocks of ice are pushed skyward along pressure ridges as the sea ice thins and forms melt pools. Silver-backed

Enormous blocks of ice are pushed skyward along pressure ridges as the sea ice thins and forms melt pools. Silver-backedEnormous blocks of ice are pushed skyward along pressure ridges as the sea ice thins and forms melt pools. Pram Point, McMurdo Sound, Ross Island, Antarctica.

The textured and leathery scales on the skin surround the eye of a Black Caiman

A mother carves the cap of a pumpkin for Halloween

A gilded bronze statue by the Potomac River featuring Mars on a horse

Wadi Bani Awf

Competitors in a camel endurance race plod along a dusty Outback track Flinders River

The world's highest wetland runs through a valley surrounded by forested hills in the Himalaya

A cameraman filming from the sheer icy walls of a crevasse on the slopes of Mount Erebus in Antarctica

A storm surge wets the sand on a wide empty beach at sunset

A Southern Humpback Whale dives below the ocean surface in a Heat Run

A man walking through a golden field of corn at sunset

Detail of Algae growth on a Sea Kelp frond Portsea Pier

The fractured and tortured ice tongue of the Mt Erebus Glacier sweeps off the slopes of the active volcano