The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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The elephant brain weighs about 6,000g.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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A 42-foot sperm whale has about 7 tons of oil in it.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
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