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The natural world is full of the weird and the wonderful, but in wintertime it just gets weirder.

From snowboarding crows to polar bear parties, seemingly suicidal penguins, festive ice discs, the miracle revival of a man frozen solid and spooky twizzling turkeys, this Christmas serves up weird stories of the unexplained, unexpected and the unidentifiable from across the globe.

Using state-of-the-art science, expert analysis and first-hand eyewitness accounts, we examine the evidence, test the theories and unravel some of the strangest stories our planet has to offer. Based in a remote hut for the winter, naturalist Chris Packham embarks on a fascinating journey to try to explain some of winter's weirdest events. With the help of leading scientists and engaging contributors, Chris reveals secrets from the natural world, from bizarre science to animal oddities, crazy weather, medical marvels and remarkable natural phenomena.