It showed polar bear cubs in a den with their mother, with many people assuming the young animals were born and filmed in the Arctic.

BBC: Sir David Attenborough

In 2011, the BBC denied misleading viewers of Attenborough's frozen planet series with footage of newborn polar bear cubs filmed in an animal park, rather than in the wild.

BBC: Africa TV series edited over climate change comment

The move comes a year after an episode of Frozen Planet, featuring a polar bear with her cubs, was criticised.

BBC: Sir David Attenborough

Meanwhile, as a mother polar bear somewhere wept over the desperate fate of her cubs (overpopulation), and despite the past 17 years of flat global temperatures, thousands of Keystone XL opponents braving near-freezing temperatures and biting winds, protested in front of White House gates.

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