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Exclusive report: Inside Chernobyl, 40 years after nuclear disaster

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Neanderthal infants were enormous compared with modern humans

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A key solution to climate change isn't happening – and that's good

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The rise, the fall and the rebound of cyclic cosmology

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The man who crawls into the perilous heart of the Chernobyl reactor

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Largest ever map of universe captures 47 million galaxies and quasars

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The secret project to settle controversial maths proof with a computer

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Are Neanderthals descendants of modern humans?

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The biggest threat to Chernobyl is no longer radiation

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Monkeys walk around a virtual world using only their thoughts