This series explores the world around us, providing clear, easy-to-read information on a wide range of topics that will be of interest to the younger reader.
This is Book 3 in the Our World Series. See all Our World books here.
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Peter Riley has written books, websites and CDRoms on science subjects from astronomy to zoology. He was Head of Science in a large secondary school for seventeen years before becoming a full-time writer in 1996.
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