Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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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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When dragonflies mate, their tails form a love heart.
22
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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