Orangutans share more than 96 per cent of their DNA with humans, but sadly they are now critically endangered.
They are one of the largest mammals on earth and are about seven times as strong as humans, with powerful arms and feet that allow them to spend most of their time in the trees.
The mammals are so intelligent that they can recognise themselves in the mirror, use tools and even talk to humans using sign language.
Unfortunately, there are only around 104,700 Bornean, 13,846 Sumatran and 800 Tapanuli orangutans left in the world, according to the World Wide Fund for Nature.
A century ago there were probably more than 230,000 orangutans in total.
Their demise is largely down to the destruction of their habitat, as we tear down rainforests to produce palm oil.
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