Amoeba proteus

Widespread heterotrophic unicellular organisms with constantly changing shapes

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Saber-toothed cat

Large, extinct species of cats named after the shape of their large canine teeth.

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Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.

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Tardigrades can survive in extreme environments, they can even stay alive in outer space.

European ground squirrel

Subterranean rodents widespread in Central- and Eastern Europe.

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