Sharks

Teeth of terror: Nature's not-so pearly whites
Take a peek at your peril. Animals show off their best "smile."
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Although it looks like the photographer who snapped this picture turned into this tiger shark's dinner, both parties walked away unharmed. Photography intern Cat Schultz with the RJ Dunlap Marine Conservation Program took this picture during a tagging project to learn more about tiger sharks' migration patterns.

(Cat Schultz/RJ Dunlap Marine Conservation Program)

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A baboon yawns in its compound in a zoo at the start of a warm day in New Delhi.
(Reuters)

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A Siberian tiger growls at the St-Felicien Wildlife zoo in St-Felicien, Quebec.
(Reuters)

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Walker, a 23 month old polar bear, experiences snow for the first time in his 4 acre enclosure at the Highland Wildlife Park in Kingussie, Scotland.
(Reuters)

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Masha, a female raccoon, displays her teeth in her wooden refuge inside an open-air cage where she hibernates at the Royev Ruchey zoo in Krasnoyarsk.
(Reuters)

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Khan, a 3-year-old male Bengali white tiger, grimaces inside an open-air cage at the Royev Ruchey zoo on the suburbs of Russia's Siberian city of Krasnoyarsk.
(Reuters)

chimp

Omega, a 12-year-old chimpanzee, reacts at a Brazilian sanctuary in Curitiba in the southern state of Parana.
(Reuters)

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A lions yawns at Nairobi's National Park in Kenya.

(Reuters)

Lioness

Female African lion Annie growls during a walk with her three 2-month-old cubs, inside an open-air cage at the Royev Ruchey zoo in Russia's Siberian city of Krasnoyarsk.
(Reuters)

huskies

Two huskies growl at each other.

(Reuters)

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An adult male Tasmanian Devil named Tex stretches his jaws open in his enclosure at Sydney's Taronga Zoo.
(Reuters)

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A cayman crocodile is seen in his enclosure at Belgrade's zoo.
(Reuters)

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A ten-year-old mandrill looks out from its enclosure at Hongshan Forest Zoo in Nanjing, east China's Jiangsu province.
(Reuters)

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A Rodrigue fruit bat hangs on a perch in the Masoala Rainforest hall at the zoo in Zurich.
(Reuters)

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A police dog reacts as protesters clash with law enforcement troops during a soccer game in Belo Horizonte, Brazil.

(Reuters)

hippo

A hippopotamus opens its mouth in a river in Grumeti in Tanzania's Serengeti National Park.
(Reuters)

snowleopards

Two young snow leopards snarl.
(Reuters)

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A baboon yawns in his enclosure while sitting in the sun at the Hellabrunn zoo in Munich.
(Reuters)

Teeth of terror: Nature's not-so pearly whites

Take a peek at your peril. Animals show off their best "smile."

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