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A humpback whale, Megaptera novaeangliae, raises its powerful fluke out of the blue waters of the Caribbean Sea and slams it down on the surface to communicate.

Adult humpback whale (Megaptera novaeangliae) flukes-up dive in Inian Pass, Southeast Alaska, Pacific Ocean, United States of America, North America

Young adult polar bear (Ursus maritimus) on ice in Hinlopen Strait, Svalbard, Norway, Scandinaiva, Europe

Tourists in the company of net fishermen in rowing boat, village of Ramadi, west bank of the Nile south of Edfu, Egypt, North Africa, Africa

Atlantic salmon (Salmo salar) leaping on upstream migration, River Tyne, Hexham, Northumberland, England, United Kingdom, Europe

Fossach Falls near Loch Lomond, Loch Lomond and The Trossach National Park, Scotland, United Kingdom, Europe

November 28, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible against blue night sky.

November 27, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.

November 26, 2012 - Powerful explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.

November 26, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.

November 25, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.

November 26, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.

September 12, 2009 - Plume Geyser eruption, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.

September 12, 2009 - Castle Geyser eruption with rainbow, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.

September 12, 2009 - Castle Geyser eruption with rainbow, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.

September 12, 2009 - Sawmill Geyser, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.

September 11, 2009 - White Dome Geyser erupting, Lower Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.

June 2006 - Ejection of lava during nighttime Strombolian eruption of Stromboli volcano, Aeolian Islands, Mediterranian Sea, Italy.

Egyptian-style lion sculpture of Fontana dell'Obelisco on Piazza del Popolo, UNESCO, Rome, Lazio, Italy

Kids on bicycles crossing the river near the Al Thowarah hot spring (Nakhal spring), Sultanate of Oman, Arabian Peninsula

An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America

Adult humpback whale (Megaptera novaeangliae) breaching along the west side of Chatham Strait in Alaska, United States of America

Adult humpback whale (Megaptera novaeangliae) tail throw among feeding whales in Southeast Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult white-beaked dolphin (Lagenorhynchus albirostris) surfacing in the Svalbard Archipelago, Norway

Type Big B killer whales (Orcinus orca), searching ice floes for pinnipeds in the Weddell Sea, Antarctica, Polar Regions

Adult harlequin duck (Histrionicus histrionicus) in full breeding plumage in the calm waters of Lake Myvatn, Iceland

African fish eagle (Haliaeetus vocifer) drinking, Zimanga private game reserve, KwaZulu-Natal, South Africa, Africa

Perito Moreno Glacier on Lago Argentino, El Calafate, Parque Nacional Los Glaciares, UNESCO World Heritage Site, Patagonia, Argentina, South America

Tourist woman in splashing wave at Felicite Island, boulders and palm trees behind, La Digue, Seychelles, Indian Ocean, Africa

Adult sperm whale (Physeter macrocephalus) diving off Isla San Jose, Baja California Sur, Mexico, North America

Humpback whale (Megaptera novaeangliae), feeding at the surface, Alert Bay, Inside Passage, British Columbia, Canada, North America

A pod of Type A killer whales (Orcinus orca), surfacing off the northwest coast of South Georgia, Polar Regions

Geysers del Tatio (El Tatio), the third largest geyser field in the world, Andean Central Volcanic Zone, Antofagasta Region, Chile, South America

Geysers del Tatio (El Tatio), the third largest geyser field in the world, Andean Central Volcanic Zone, Antofagasta Region, Chile, South America

Tourists at the Geysers del Tatio (El Tatio), the third largest geyser field in the world, Andean Central Volcanic Zone, Antofagasta Region, Chile, South America

Adult Munk's pygmy devil ray, Mobula munkiana, leaping into the air, Isla San Jose, Baja California Sur, Mexico, North America

Shooting the rapids in a raft on the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Morro Castle and lighthouse guard the entrance to Havana Bay, Havana, Cuba, West Indies, Central America

A pod of mammal eating killer whales (Orcinus orca), surfacing on Ningaloo Reef, Western Australia, Australia, Pacific

Humpback whale (Megaptera novaeangliae), adult breaching on Ningaloo Reef, Western Australia, Australia, Pacific

Adult bottlenose dolphin (Tursiops truncatus), motion blur image off Isla San Pedro Martir, Baja California Norte, Mexico, North America

Heavy rain and water logging on road during Monsoon season, Phnom Penh, Cambodia, Indochina, Southeast Asia, Asia

Sgwd Gwladys waterfall, Pyrddin Gorge, Pontneddfechan, Neath Valley, South Wales, United Kingdom, Europe

Guests from the Lindblad Expedition ship National Geographic Endeavour in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Woman walking small dogs scared of a large playful Ridgeback on popular Playa Guiones surf beach, Guiones, Nosara, Guanacaste, Costa Rica

Photographer Skip Brown surfs his kayak on a whitewater wave on the Potomac River, border of Virginia and Maryland, United States of America, North America

Adult false killer whales (Pseudorca crassidens), surfacing on Ningaloo Reef, Western Australia, Australia, Pacific

A pod of killer whales (Orcinus orca), attacking a humpback whale on Ningaloo Reef, Western Australia, Australia, Pacific

A humpback whale, Megaptera novaeangliae, raises its powerful fluke out of the blue waters of the Caribbean Sea and slams it down on the surface to communicate.

Adult humpback whale (Megaptera novaeangliae) flukes-up dive in Inian Pass, Southeast Alaska, Pacific Ocean, United States of America, North America

Young woman by the torrent, Riva Valley (Val di Riva) (Reintal), near Ahrntal (Valle Aurina), South Tyrol (Alto Adige), Italy

Tourists hand-feeding tarpon (Megalops atlaticus), at feeding station inside the Mesoamerican Barrier Reef, Belize