Today, we learned that every single polar bear we've been watching on Frozen Planet has, in fact, been David and Richard Attenborough walking around in a pantomime polar bear outfit. Or something.
But while the readers of [insert Beeb-bashing newspaper here] have been outraged by news that some of Frozen Planet's footage was shot in a zoo, the users of Twitter have been less outraged.
Mainly because it's a great opportunity to make jokes. And here are the very best of them...
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