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November 2006 - Boulder rolling in lava flow at dusk during eruption of Mount Etna volcano, Sicily, Italy.

Portrait of an American saltwater crocodile on the surface of a mangrove at sunset with mouth wide open, Jardines De La Reina, Cuba.

American saltwater crocodile (Crocodylus acutus) in mangrove with mouth open showing teeth, Jardines De La Reina, Cuba.

Pair of Caribbean reef sharks (Carcharhinus perezi) swimming along the reef, Jardines De La Reina, Cuba.

An oceanic blacktip shark swims by with remora in tow, Aliwal Shoal, Umkomaas, KwaZulu-Natal, South Africa.

A pair of oceanic blacktip sharks with remora in tow pass each other by in a cloud of silvery fish, Aliwal Shoal, Umkomaas, KwaZulu-Natal, South Africa.

Rock climber in action, Yorkshire Dales National Park, North Yorkshire, England, United Kingdom, Europe

Nuclear Lightning, a lightning storm striking near a nuclear power plant in Wintersburg during the 2015 Monsoon Season, Arizona, United States of America, North America

Ardnamurchan Lighthouse, at the westernmost point of the British mainland, west coast, Scotland, United Kingdom, Europe

A shortfin lionfish (Dendrochirus brachypterus) lays on the seafloor waiting for prey to swim near in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

A camouflaged horned flathead (Thysanophrys carbunculus) lays hidden on a sandy slope near the island of Sulawesi, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

A lionfish (Pterois volitans) hunts for prey in a seagrass meadow in the Banda Islands of eastern Indonesia.

An unidentified scorpionfish waits to ambush prey on a black sand slope in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

Danger sign in front of volcanic field and steaming pond in Noboribetsu, Hell Valley, Hokkaido, Japan, Asia

Lightning from a monsoon storm striking behind an old railroad trestle bridge that spans Bear Canyon near Perkinsville, Arizona, United States of America, North America

Sign on road with stratified volcanic rocks in the background, Parque Nacional del Teide, Tenerife, Canary Islands, Spain, Atlantic, Europe

A climber scales a limestone cliff in Upper Wharfedale, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe

A lionfish (Pterois volitans) swims along the edge of a beautiful reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A sleek blue shark (Prionace glauca) cruises through the cold waters off Cape Cod, Massachusetts, in the Atlantic Ocean. These beautiful elasmobranchs are found throughout the world in both temperate and tropical seas and are a species listed as Near Thre

A sleek blue shark (Prionace glauca) cruises through the cold waters off Cape Cod, Massachusetts, in the Atlantic Ocean. These beautiful elasmobranchs are found throughout the world in both temperate and tropical seas and are a species listed as Near Thre

A large banded sea snake, Laticauda colubrina, sinuously swims over a beautiful reef in Wakatobi National Park, Indonesia.

American Alligator (Alligator mississippiensis) split over and under water shot, Florida Everglades, Florida.

Springbok (Antidorcas marsupialis) watching lion, Kgalagadi Transfrontier Park, Northern Cape, South Africa, Africa

Rock climber lowering off after ascending a steep climb on the cliffs of Malta, Mediterranean, Europe

Lightning strike over Grand Canyon south rim from Cape Royal, north rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A snowflake moray eel (Echidna nebulosa) pokes its head out of a hole in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A flathead fish camouflages itself in the sandy seafloor of Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

A lionfish (Pterois volitans) displays its venomous spines in Komodo National Park, Indonesia. This tropical area in the western Pacific harbors an extraordinary array of marine organisms.

A sleek blue shark (Prionace glauca) cruises through the cold waters off Cape Cod, Massachusetts, in the Atlantic Ocean. These beautiful elasmobranchs are found throughout the world in both temperate and tropical seas and are a species listed as Near Thre

A banded sea snake (Laticauda colubrina) swims at the surface in Wakatobi National Park, Indonesia. This is one of the most venomous snakes in the world.

A well-camouflaged reef stonefish, Synanceia verrucosa, waits to ambush prey in Raja Ampat, Indonesia.

A beautiful bouquet of tunicates and cnidarians grows on a reef in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

A woman tackles a very difficult climb on limestone cliffs near Siuarana, a medieval village near Reus and Barcelona, Catalonia, Spain, Europe

A man on a very long and overhanging climb on the famous limestone cliffs of the Mascun Canyon, Rodellar, Sierra de Guara, Aragon, southern Pyrenees, Spain, Europe

A woman on a technical face climb on the limestone cliffs of the Mascun Canyon, Rodellar, Sierra de Guara, Aragon, southern Pyrenees, Spain, Europe

A climber makes her way up a steep and difficult route on the limestone cliffs in the Aveyron region, near Millau and Toulouse, south west France, Europe

A woman climbing on limestone cliffs near Siurana, a medieval village near Reus and Barcelona, Catalonia, Spain, Europe

A panorama photo of lightning striking the slopes of Woolsey Peak during the 2012 Arizona Monsoon season, Arizona, United States of America, North America

Imerovigli village perched on red volcanic hill, island of Santorini (Thira), Cyclades, Greek Islands, Greece, Europe

Looking west towards Cape Cornwall and Lands End from Bosigran Cliff, West Penwith, Cornwall, England, United Kingdom, Europe

A large black-blotched stingray (Taeniura meyeni) swims in deep water near Cocos Island, Costa Rica. This remote island is home to an incredible variety of marine life.

An unidentified moray eel (Gymnothorax sp.) swims over a sandy seafloor in Komodo National Park, Indonesia.

A snowflake moray eel (Echidna nebulosa) peeks out from a dark hole on a reef in Komodo National Park, Indonesia.