10 October 2011
Last updated at 07:51
Arid Niger desert is 'Noah's ark'
More Galleries
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Big birdwatch
Beautiful birds to look out for during this year's big garden birdwatch
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Cool elephants
Thermal images reveal how Asian elephants cool off
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Weird species
New species recorded in the forests of Suriname
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Monkey faces
Why monkeys have such varied colourful faces
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Winter wonderland
Your best winter-themed nature photographs