Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Only 3% of bird species have penises.
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When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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