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How old is Earth? Why is the sky blue? What are the 'northern lights'? Why is a desert cold at night?
Bursting with bite-sized facts, illustrations and diagrams, this engaging 64–page book contains answers to all the questions you always wanted to ask about our planet - and more!
No question is too tough to tackle, and no answer too difficult to explain. Focus On titles are the ultimate in addictive reading!
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