(BCR) Dave Reede/All Canada Photos/Alamy Images; 524 DK Images; 543 (T) I G Kinoshita/amana images/Getty Images; 544 (BR, BL, BC) RubberBall/Alamy; 557 (BCR) North Wind Picture Archives/Alamy Images; 561 (TR, TCR) Ron Kimball/Kimball Stock; 563 (TC) Courtesy of the Division of Anthropology/American Museum of Natural History, (TR) Humberto Olarte Cupas/Alamy Images, 564 (TR) Alan Copson/City Pictures/Alamy Images; 570 (BCR) ©DK Images, (TCL) Image Source/Jupiter Images, (CC) iStockphoto; 571 (BR) Peter Blackwell/Nature Picture Library, (BL) Vladimir Wrangel/Alamy; 572 (TCR) D. Hurst/Alamy, (TCL) Owaki – Kulla/Corbis; 575 (C) Martin William Allen/Alamy; 577 (BR) Keith Leighton/Alamy, (BCR) Reven T.C. Wurman/Alamy Images; 591 (TC) age fotostock/SuperStock, (TR) Alfred Pasieka/Photo Researchers, Inc., (TL) Elisa Locci/Alamy; 595 (BL, BR) M.C. Escher's “Symmetry E69” © 2009 The M.C. Escher Company-Holland. All rights reserved. www.mcescher.com 596 (TL) M.C. Escher's “Symmetry E56” © 2009 The M.C. Escher Company-Holland. All rights reserved. www.mcescher.com (TR) M.C. Escher's “Symmetry E18” © 2009 The M.C. Escher Company-Holland. All rights reserved. www.mcescher.com 598 (CR, CL) mediacolor's/Alamy Images, (BR) Paul Panayiotou/Alamy Images, (BL) Petr Svarc/Alamy Images; 602 (CR) Douglas Kirkland/Corbis; 613 (T) Jim West/Alamy Images; 618 (TR) Bob Gates/Alamy Images; 625 (TR) Joe Sohm/Visions of America/Alamy; 627 (TR) artpartner-images/Alamy Images; 633 (TR) Dennis Marsico/Corbis; 644 (TR) Alan Schein Photography/Corbis; 661 (TR) Matthias Tunger/Photonica/Getty Images; 668 (TCR) Clive Streeter/©DK Images; 670 (BR) amana images inc./Alamy; 687 (T) ©Associated Press; 693 (BCR) Sports Bokeh/Alamy; 705 (TR) Ron Chapple Stock/Alamy; 710 (TR) Adam Eastland/Alamy Images; 727 (TR) age fotostock/SuperStock; 728 (BCR) John E Marriott/Alamy Images; 733 (BCR) D. Hurst/Alamy; 737 (TL) Andrew Paterson/Alamy, (TC) Getty Images, (TR) Image Source/Getty Images; 738 (BR) Stephen Sweet/Alamy; 744 (TR) Jupiterimages/BananaStock/Alamy; 745 (TR) Andre Jenny/Alamy Images; 761 (T) NASA; 764 (TCR) Marshall Space Flight Center Collection/NASA, (TR) T. Pohling/Alamy Images; 768 (TR, TCR, TC) Clive Streeter/©DK Images; 775 (TR) Cris Bouroncle/Staff/AFP/Getty Images; 785 (BR) Vario Images GmbH & Co.KG/Alamy Images; 792 (TR) Marshall Space Flight Center Collection/NASA; 794 (BR) Melvyn Longhurst/Alamy; 795 (BR) dpa/Corbis; 807 (BR) ©matthiasengelien/Alamy.

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