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jungle engineers

Orangutans have remarkable engineering skills when it comes to making houses up in trees.

This we know from researchers at the University of Manchester who studied the apes in the forests of Sumatra. The scientists took orangutans' nests apart to see how they had been built.

The trick – if you're an orangutan replacing a nest nicked by an academic – is to bend large flexible branches into a strong scaffold and fill it with fine leafy branches to make a bed.

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