Glacier ice melting and icebergs at Perito Moreno, Moreno Glacier, Parque Nacional Los Glaciares, UNESCO World Heritage Site, Patagonia, Argentina, South America

Garibaldi Glacier, Darwin National Park, Tierra del Fuego, Patagonia, Chile, South America

Piece of glacial ice washed ashore by the incoming tide onto beach of volcanic sand near glacial lagoon at Jokulsarlon, Iceland, Polar Regions

Calving glacier, Perito Moreno Glacier, Los Glaciares National Park, UNESCO World Heritage Site, Santa Cruz, Argentina, South America

Black bear (Ursus americanus), outside Glacier National Park, Montana, United States of America, North America

Grizzly bear (Ursus horribilis), Glacier National Park, Montana, United States of America, North America

Piece of glacial ice washed ashore by the incoming tide near glacial lagoon at Jokulsarlon, Iceland, Polar Regions

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Aerial of the Eqi glacier, Western Greenland, Denmark, Polar Regions

The Lindblad Expedition ship National Geographic Explorer near glacial run-off in the Svalbard Archipelago, Norway, Arctic, Europe

Adult brown bear (Ursus arctos) shaking water from its fur near whale carcass in Glacier Bay National Park, Alaska, United States of America

A snowboarder enjoys superb spring snow high on the famous Valley Blanche ski run, one of the world's most celebrated glacier descents, with Mont Blanc Du Tacul in the distance, Mont Blanc, Chamonix, western Alps, France, Europe

Grizzly bear (Ursus horribilis), Glacier National Park, Montana, United States of America, North America

Snowmobiling on the Vatnajskull ice cap, Iceland

South Sawyer Glacier in Tracy Arm - Fords Terror Wilderness area in Southeast Alaska, USA.

Humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in front of Mendenhall Glacier in Stephen's Passage, Southeast Alaska, USA. Pacific Ocean.

Water melting from the Briksdalsbreen glacier south of the small town of Olden in coastal Norway

Water melting from the Briksdalsbreen glacier south of the small town of Olden in coastal Norway

Water melting from the Briksdalsbreen glacier south of the small town of Olden in coastal Norway

Adult Tufted Puffin (Fratercula cirrhata) taking flight in Glacier Bay National Park, southeast Alaska, USA.

Malaspina Glacier, Alaska

Almsiedlung Obersteinberg with Großhorn, Breithorn and Tschingelhorn in the background, Obersteinberg, Bernese Oberland, UNESCO World Natural Heritage Swiss Alps Jungfrau-Aletsch, Bernese Alps, Bern, Switzerland

Woman on the Gemmi adventure via ferrata goes over rope bridge, Walliser Alps with cathedral and Weisshorn in the background, Gemmi, Bernese Alps, Wallis, Switzerland

Glaciers washing up on remote beach, Jokulsarlon, Iceland