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Photo credits<br />
p. 2 and p. 29 © Corbis Premium RF / Alamy; p. 4 (left) © johny007pan – Fotolia; p. 4 (right) © Dionisvera – Fotolia; p. 11 ©<br />
p. 15 © sciencephotos / Alamy; p. 16 (left) © sciencephotos / Alamy; p. 16 (middle) ©<br />
p. 16 (right) © SCIENCE PHOTO LIBRARY; p. 17 © Alvey & Towers Picture Library / Alamy; p. 18 ©<br />
p. 20 (top) © ASampedro – Fotolia; p. 20 (bottom) © MARK SYKES/SCIENCE PHOTO LIBRARY; p. 21 (left) ©<br />
p. 21 (middle) © ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY; p. 21 (right) © hriana – Fotolia; p. 22 ©<br />
SCIENCE PHOTO LIBRARY; p. 23 © ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY; p. 24 © Richard Grime<br />
SCIENCE PHOTO LIBRARY;<br />
TREVOR CLIFFORD PHOTOGRAPHY/SCIENCE PHOTO LIBRARY;<br />
2005 Richard Megna - Fundamental Photographs;<br />
SCIENCE PHOTO LIBRARY;<br />
ANDREW LAMBERT PHOTOGRAPHY/<br />
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© Richard Grime and Nora Henry 2015<br />
ISBN 978-1-4718-5134-6<br />
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