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

A young killer whale (Orcinus orca) surfacing in Glacier Bay National Park, Southeast Alaska, United States of America, Pacific Ocean, North America

Juvenile humpback whale (Megaptera novaeangliae) breaching near the Antarctic Peninsula, Antarctica, Polar Regions

Ice avalanche, glacial calving into iceberg filled Neko Harbour, early morning sun, Graham Land, Antarctic Continent, Antarctica, Polar Regions

The face of glacier calving off on the South Sawyer Glacier, Tracy Arm, Southeast Alaska, United States of America, North America

The face of glacier calving off on the South Sawyer Glacier, Tracy Arm, Southeast Alaska, United States of America, North America

A massive series of waves formed after a huge calving event from the glacier in Neko Harbor, Antarctica, Polar Regions

A massive series of waves formed after a huge calving event from the glacier in Neko Harbor, Antarctica, Polar Regions

Huge icebergs calving from the Ilulissat Glacier, UNESCO World Heritage Site, Ilulissat, Greenland, Polar Regions

Calving glacier, chunks of ice fall from glacier into Skjoldungen Fjord, creating huge splash, remote South East Greenland, Denmark, Polar Regions

View of a land-based glacier calving into the sea. Hannah Point, Livingston Island, ntarctic Peninsula, Antarctica.

Guests from the Lindblad Expeditions ship National Geographic Sea Lion, Southeast Alaska, USA

Guests from the Lindblad Expeditions ship National Geographic Sea Lion, Southeast Alaska, USA

Guests from the Lindblad Expeditions ship National Geographic Sea Lion, Southeast Alaska, USA

Adult black-legged kittiwake (Rissa tridactyla) take flight during a calving event near a glacier in the Svalbard Archipelago, Barents Sea, Norway.

Guests from the Lindblad Expeditions ship National Geographic Sea Lion, Southeast Alaska, USA

Guests from the Lindblad Expeditions ship National Geographic Sea Lion, Southeast Alaska, USA

Guests from the Lindblad Expeditions ship National Geographic Sea Lion, Southeast Alaska, USA

The glacier tongue calves into the Pacific, Columbia Glacier, Prince William Sound, Alaska, USA, North America

A gray whale swims near tourists in a boat in Ojo de Liebre Lagoon near the town of Guerrero Negro in Mexico's southern Baja California state, February 18, 2009. The Gray Whale emigrate every year from the North American Pacific Coast from arctic seas to the lagoons of Baja California, Mexico for mating and calving. The whales make one of the longest of all mammalian migrations, averaging 10,000-14,000 miles, Mexico

A gray whale swims near tourists in Ojo de Liebre Lagoon near the town of Guerrero Negro in Mexico's southern Baja California state, February 18, 2009. The Gray Whale emigrate every year from the North American Pacific Coast from arctic seas to the lagoons of Baja California, Mexico for mating and calving. The whales make one of the longest of all mammalian migrations, averaging 10,000-14,000 miles, Mexico

Calving Hubbard Glacier near Yakutak, Alaska, USA, Alaska, United States of America

Calving or collapse of glacier Pedasenkobreen, Spitzberg, Svalbard

Calving or collapse of glacier Pedasenkobreen, Spitzberg, Svalbard

Kronebreen glacier calving in Kongsfjord, Spitsbergen, Arctic

Calving or collapse of glacier Pedasenkobreen, Spitzberg, Svalbard

Calving or collapse of glacier Pedasenkobreen, Spitzberg, Svalbard