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Orangutans are the largest tree-dwelling mammals

Orangutans are the largest mammals that live in trees, with arms much longer than their legs.

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Grasping hands and feet with long curved fingers suit them to life in the canopy. They are also the most solitary of the great apes.

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Bowhead whales can live more than 200 years

Evidence suggests that bowhead whales can live for over 200 years.

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The last wild horse has 66 chromosomes

Przewalski's horses, the last truly wild horses, have 66 chromosomes. Domestic horses have 64.

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Giant manta rays span up to 26 feet

The giant manta ray is the world's largest ray, with a wingspan of up to 26 feet.

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