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William warns world is at 'tipping point' as he launches environmental prize

Royal aides close to the Duke of Cambridge warn the planet is reaching a "number of tipping points" from which there is no way back to repair the damage.

Satellite finds new emperor penguin colonies in Antarctica

The new discovery means the known population of the birds has swelled to more than half a million, according to researchers.

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'It's much easier than climbing Everest!'

On the 45th anniversary of his summit of Mount Everest, the British mountaineer is scaling his stairs in climbing gear to raise funds for a Nepalese charity.