The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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The Amazon rainforest produces more than 20% the world's oxygen supply.
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In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
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Mexico City is built on top of an underground resevoir!
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There are approximately three chickens for every human on Earth.
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