In Ice Age, the drawings of characters during the end credit roll - and Sid's drawing of himself on a wall - were all done by the children of the animators.
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There's a rare breed of pig that looks like a sheep.
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Sheep can survive for up to two weeks buried in snow drifts.
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During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
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