By Lovelock, James, Davies, Nicola, Russell, Harriet
By Ganeri, Anita, Phillips, Mike
By Dorion, Christiane, Young, Beverley
By Baird Rattini, Kristin, National Geographic Kids
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By Thomas, Susan
By Chris Oxlade
By Challoner, Jack
By Barber, Nicola
By Wigram, Nick
By Cosgrove, Brian
By DK
By Wilson, Anthony
By Angliss, Sarah
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