T, ©Gyeongsang National University/HO/epa/Corbis; ©Gyeongsang National University/HO/epa/Corbis; B, ©David Parker/Photo Researchers, Inc. 422: Wernher Krutein/Photovault. 424: Torunn Berge/Photo Researchers, Inc. 427: AP Photo/PA/Files. 428: B, AGStock/Alamy; T, ©Gyeongsang National University/HO/epa/Corbis. 429: Goat, Jan L. Carson/University of California at Davis; Girl, ©istockphoto.com/Katrina Brown. 430: UPI/Digital Railroad.net. 431: Mickie Gelsinger. 432: Dr. Malcolm Campbell and the GCAT Program of Davidson College. 433: Index Stock/SuperStock. 434: ©David Parker/Photo Researchers, Inc. 435: BL, Courtesy, J. Craig Venter Institute; Insets, Courtesy, J. Craig Venter Institute. 436: ©Gyeongsang National University/HO/epa/Corbis. 437: T, ©Charles Smith/Corbis; B, ©David Parker/Photo Researchers, Inc. 439: www.glofish.com. 443: ©David Parker/Photo Researchers, Inc. 447: ©Tui De Roy/Minden Pictures. 448–449: ©Chip Clark. 449: TR, ©Chris Johns/National Geographic Image Collection. 450: TR, AKG/Photo Researchers, Inc.; TL, ©Chip Clark. 451: DK IMAGES. 452: B, Chris Johns/National Geographic Image Collection; T, ©Tui De Roy/Minden Pictures; M, ©Tui De Roy/Minden Pictures. 454: B, ©Momatiuk - Eastcott/Corbis; T, ©Chip Clark. 455: B, The Natural History Museum, London; T, ©Alfio Leonardi/stockimagesnet.com. 456: ©Tom Vezo/Minden Pictures. 457: ©Snark/Art Resource, NY. 458: TL, Portrait of Pouter Pigeon (coloured engraving), Wolsenholme, D. (fl.1862)/Down House, Kent, UK,/The Bridgeman Art Library International; TR, Portrait of a Beard Pigeon (coloured engraving), Wolsenholme, D. (fl.1862)/Down House, Kent, UK,/The Bridgeman Art Library International; B, Portrait of a Carrier Pigeon (coloured engraving), Wolsenholme, D. (fl.1862)/Down House, Kent, UK,/The Bridgeman Art Library International. 459: L, Heritage Image Partnership; M, Heritage Image Partnership; BR, The Granger Collection, New York; TR, The Granger Collection, New York. 460: ©Chip Clark. 461: TR, ©Hal Beral/V&W/The Image Works; BL, ©Steve Kaufman/Peter Arnold; TL, E. R. Degginger/Photo Researchers, Inc.; BR, ©Markus Varesvuo/Nature Picture Library. 463: T, ©CHRIS JOHNS/National Geographic Image Collection; BL, ©Photodisc/SuperStock; BR, ©Maria Mosolova/Photo Researchers, Inc. 464: B, ©ABPL/HINDE, GERALD/Animals Animals Enterprises; T, Cambridge University Library. 465: B, ©CHRIS JOHNS/National Geographic Image Collection; T, ©Chip Clark. 467: www.neoucom.edu/DEPTS/ANAT/Thewissen/index.html. ©J. G. M. Thewissen. 469: L, Wayne Lynch/AGE Fotostock; M, ©4nature/Peter Arnold Inc.; R, ©Scott Gilbert. 471: Bkgrnd, Thermal Biology Institute; Inset, Used by permission of Globe Pequot Press. From Seen and Unseen, by Kathy B. Sheehan, David J. Patterson, Brett Leigh Dicks, and Joan M Henson, ©2005. Photo by David J. Patterson. 476: L, Pearson Education/PH School; R, Pearson Education/PH School. 477: ©CHRIS JOHNS/National Geographic Image Collection. 480–481: ©R. Hoelzl/Peter Arnold Inc. 481: TR, ©Pearson Education. Photo by Heather Wright. 482: B, ©Jupiterimages/AP Wide World Photos; T, ©R. Hoelzl/Peter Arnold Inc. 484: B, ©Pearson Education. Photo by Heather Wright; T, ©Brand X/SuperStock. 485: WIL MEINDERTS/FOTO NATURA/Minden Pictures. 486: Oxford University Press/United Kingdom. 487: B, Paul Grebliunas/Getty Images; T, ©R. Hoelzl/Peter Arnold Inc. 488: B, ©Charlie Ott/Photo Researchers, Inc.; T, ©Pearson Education. Photo by Heather Wright. 491: ©FRANS LANTING/Minden Pictures. 492: ©Ashley Cooper/Corbis. 493: B, Centers for Disease Control; TMR, ©SuperStock, Inc.; TML, ©Digital Vision Ltd./SuperStock; TR, ©fStop/SuperStock; TL, ©Digital Vision Ltd./SuperStock. 494: B, ©Pearson Education. Photo by Heather Wright; T, ©R. Hoelzl/Peter Arnold Inc. 495: Inset, L, ©Rick & Nora Bowers/Alamy; Inset, R, ©Thomas & Pat Leeson/Photo Researchers, Inc.; Bkgrnd, ©Corbis/SuperStock. 498: ©R. Hoelzl/Peter Arnold Inc. 503: ©Rick & Nora Bowers/Alamy. 505: B, ©James Cavallini/Custom Medical Stock Photo 2002; T, ©Pearson Education. Photo by Heather Wright. 508–509: ©Chip Clark. 509: RB, ©Mark Hamblin/age fotostock; RT, ©Kevin Schafer/age fotostock. 510: B, Corbis/Superstock; T, ©Chip Clark. 511: TR, ©Matthew Ward/DK Images; Key, T, ©Matthew Ward/DK Images; Key, Upper ML, ©Matthew Ward/DK Images; Key, Lower ML, ©Matthew Ward/DK Images; Key, Lower MR, ©Matthew Ward/DK Images; Key, B, ©Matthew Ward/DK Images; Key, Upper MR, ©Peter Chadwick/DK Images. 512: M, ©Hans Strand/Age Fotostock; B, ©Paul Debois/Age Fotostock; T, ©Mark Hamblin/age fotostock. 513: BR, Portrait of Carl von Linnaeus (1707-78) (oil on canvas), Roslin, Alexander (1718-93)/Chateau de Versailles, France, Lauros/Giraudon/The Bridgeman Art Library International; T, ©s-dmit/istockphoto.com. 514: ©W. Perry Conway/CORBIS. 515: TR, ©2006 Kåre Telnes/Image Quest Marine; MR, ©age fotostock/SuperStock; L, ©Piotr Naskrecki/ Minden Pictures. 516: ©Chip Clark. 518: MR, ©Wayne Lynch/DRK Photo; ML, Tom Smith/Shutterstock; B, ©blickwinkel/Alamy. 521: T, ©JOE MC DONALD/Animals Animals - Earth Scenes; M, ©B.K. Wheeler/VIREO; B, ©Chris Zwaenepoel/istockphoto.com. 522: BRM, ©Gerry Ellis/Minden Pictures; BLM, ©Corbis/SuperStock; BL, ©Raven Regan/robertstock.com; BR, ©Patricio Robles Gil/Sierra Madre/Minden Pictures; T, ©Kevin Schafer/age fotostock. 523: ©Chip Clark. 525: ©Science Source/Photo Researchers, Inc. 526: T, ©Eye of Science/Photo Researchers Inc.; B, Dr. Stan Erlandsen & Dr. Dennis Feely/CDC. 527: ©Jean-Paul Ferrero/Auscape/Minden Pictures. 528: ©Michael & Patricia Fogden/Minden Pictures. 529: R, ©Biodiversity Institute of Ontario; M, ©Derek Dammann/istockphoto.com; L, ©Tom Vezo/Minden Pictures. 531: ©Jean-Paul Ferrero/Auscape/Minden Pictures. 533: B, ©Mark Hamblin/age fotostock; T, ©Kevin Schafer/age fotostock. 536–537: Natural History Museum, London. 537: TR, ©Marvin Dembinsky Photo Associates/Alamy. 538: BL, Lester V. Bergman/Corbis; BR, Howard Grey/Stone/Getty Images; T, Natural History Museum, London. 539: Jason Edwards/National Geographic/Getty Images. 543: ©Marvin Dembinsky Photo Associates/Alamy. 545: Jeff Foott/Discovery Channel/Getty Images. 546: B, François Gohier/Photo Researchers, Inc.; T, Natural History Museum, London. 548: ©Marvin Dembinsky Photo Associates/Alamy. 552: Frans Lanting/Corbis. 553: B, ©age fotostock/SuperStock; T, Natural History Museum, London. 555: Science Photo Library/Photo Researchers, Inc. 559: Photo courtesy of Kristi Curry Rogers. 560: ML, ©Chase Studio/Photo Researchers, Inc.; TL, Colin Keates/DK Images; BL, Colin Keates/DK Images; BR, Colin Keates/DK Images; RM, DK Images; TR, Colin Keates/DK Images. 561: ML, Publiphoto/Photo Researchers, Inc.; BR, Laurie O'Keefe/Photo Researchers, Inc.; Upper MR, Interfoto Pressebildagentur/Alamy; TL, Luis Rey/DK Images; BL, ©Kevin Schafer/CORBIS; Lower MR, Colin Keates/DK Images; TR, Kathie Atkinson/Oxford Scientific Films/PhotoLibrary. 562: RM, DeAgostini Picture Library/Getty Images; Horsetail fossil, R, John Cancalosi/Peter Arnold; BL, Oxford Scientific/PhotoLibrary; BR, John Downs/DK Images; Horsetail, L, Ibis Bildagentur/Peter Arnold; TL, Colin Keates/DK Images; BM, John Cancalosi/Peter Arnold; TR, BrunoStock/AGE Fotostock. 563: MR, Corbis/PhotoLibrary; TR, Colin Keates/DK Images; TL, Robin Carter ©Dorling Kindersley; BL, Colin Keates©Dorling Kindersley, Courtesy of the Natural History Museum, London; BR, ©2003 Brochard/AgenceImages. 567: ©Marvin Dembinsky Photo Associates/Alamy. 571: ©Studio Eye/Corbis. 572–573: ©Ted Horowitz/CORBIS. 573: TR, Peter Cade/Getty Images. 574: TR, Norm Thomas/Photo Researchers, Inc.; BL, Peter Cade/Getty Images; TL, ©Ted Horowitz/CORBIS. 575: T, M. Wurtz/Science Photo Library/Photo Researchers, Inc.; M, Dr. O. Bradfute/FOTOGRAF/Peter Arnold; B, James Cavallini/Photo Researchers, Inc. 579: Peter Cade/Getty Images. 580: TR, Steve Gschmeissner/Photo Researchers, Inc.; BR, ©diego cervo/istockphoto.com; TL, ©Ted Horowitz/CORBIS. 581: T, CNRI/Science Photo Library/Photo Researchers, Inc; BR, Brand X/Jupiter Images. 582: TL, David Scharf/Peter Arnold; TM, Stone/Getty Images; TR, Scott Camazine/Photo Researchers, Inc.; B, Alfred Pasieka/Photo Researchers, Inc. 583: T, A.B. Dowsett/Science Photo Library/Photo Researchers, Inc.; M, Dr. Linda M. Stannard, University of Cape Town/Photo Researchers, Inc.; B, Tony Freeman/PhotoEdit, Inc. 584: BR, David Scharf/PhotoLibrary Group, Inc.; BL, Robert Knauft/Biology Pics/Photo Researchers, Inc.; TL, Steve Gschmeissner/Science Photo Library/Photo Researchers, Inc.; Bkgrnd, David Muench/Corbis. 585: David M. Dennis/PhotoLibrary Group, Inc. 586: BL, Peter Cade/Getty Images; TL, ©Ted Horowitz/CORBIS. 587: BR, David Young-Wolff/PhotoEdit, Inc.; TR, Juergen Berger/Science Photo Library/Photo Researchers, Inc. 588: Scott Camazine/Alamy. 589: Bkgrnd, Bettmann/Corbis; L, Pearson Education Curriculum Group; R, Saturn Stills/Science Photo Library/Photo Researchers, Inc.; M, SCIENCE PHOTO LIBRARY/Photolibrary Group, Inc. 590: ©Reuters/CORBIS. 591: Southhampton General Hospital/Science Photo Library/Photo Researchers, Inc. 592: Peter Cade/Getty Images. 593: MR, ©JLP/Jose L. Pelaez/Corbis; TMR, ©SuperStock, Inc.; TML, ©Digital Vision Ltd./SuperStock; TR, ©fStop/SuperStock; TL, ©Digital Vision Ltd./SuperStock. 594: Eye of Science/Photo Researchers, Inc. 595: R, Pearson Education Curriculum Group; L, David Scharf/PhotoLibrary Group, Inc. 596: Upper Left, W. Wurtz/Science Photo Library/Photo Researchers, Inc.; Upper Right, Eye of Science/Science Photo Library/Photo Researchers, Inc.; Lower Right, Alfred Pasieka/Science Photo Library/Photo Researchers, Inc.; Lower Left, David Scharf/Science Facture/Getty Images. 597: TR, Peter Cade/Getty Images. 598: Image: LambdaPlaques.jpg. 600–601: ©Patricio Robles Gil/Sierra Madre/Minden Pictures, Inc. 601: TR, Nigel Cattlin/Photo Researchers, Inc. 602: BL, AlaskaStock/Photolibrary; BR, Steve Gschmeissner/Photo; TL, ©Patricio Robles Gil/Sierra Madre/Minden. 603: BM, M. I. Walker/Photo Researchers, Inc.; BR, Eye of Science/Photo Researchers, Inc.; BL, Steve Gschmeissner/Photo Researchers, Inc. 604: ML, AlaskaStock/Photolibrary; MR, Steve Gschmeissner/Photo; TL, M. I. Walker/Photo Researchers, Inc.; TR, Eye of Science/Photo Researchers, Inc. 605: Andrew Knoll/Harvard University. 606: BL, Michael Abbey/Photo Researchers, Inc.; BM, Michael Abbey/Photo Researchers, Inc.; BR, Michael Abbey/Photo Researchers, Inc.; TL, ©Patricio Robles Gil/Sierra Madre/Minden. 607: Nigel Cattlin/Photo Researchers, Inc. 610: TR, Bob Gibbons/Photo Researchers, Inc.; TL, ©Patricio Robles Gil/Sierra Madre/Minden. 611: TR, jocrebbin/Shutterstock; Upper Middle, ©Birgitte Wilms/Minden Pictures, Inc.; BR, Bill Bachman/Photo Researchers, Inc.; LM, Howard Hall/PhotoLibrary Group, Inc. 612: Eric V. Grave/Photo Researchers, Inc. 613: BR, ©Dr. Fred M. Rhoades; MR, Nigel Cattlin/Photo Researchers, Inc. 614: BL, ©George D. Lepp/Corbis; Bkgrnd, David R. Frazier Photolibrary, Inc./Photo Researchers, Inc.; BR, Eric V. Grave/Photo Researchers, Inc. 615: TR, Eye of Science/Photo Researchers, Inc.; ML, Eye of Science/Photo Researchers, Inc.; MR, Andrew Paul Leonard/Photo Researchers, Inc.; TL, John McConnico/AP Images. 617: Susan ©Meiselas/Magnum Photos. 618: TR, Alamy Images; BL, ©Michael Hutchinson/Minden Pictures, Inc.; TL, ©Patricio Robles Gil/Sierra Madre/Minden. 619: Nigel Cattlin/Photo Researchers, Inc. 621: Nigel Cattlin/Photo Researchers, Inc. 622: TL, Michael P. Gadomski/Photo Researchers, Inc.; BL, Inga Spence/Photo Researchers, Inc.; BR, Emanuele Biggi/PhotoLibrary Group, Inc. 623: Alamy Images. 625: Bkgrnd, ©2008 Bill Heath; TR, Michael Castellano/USDA; TL, ©2008 Bill Heath. 627: Michael Abbey/Photo Researchers, Inc. 629: MR, Andrew Syred/SPL/Photo Researchers, Inc.; TR, Nigel Cattlin/Photo Researchers, Inc. 630: Copyright ©B. Runk/S. Schoenberger/Grant Heilman Photography. 632–633: ©Craig Tuttle/Corbis. 633: TR, ©Vienna Report Agency/Sygma/Corbis. 634: B, ©Digital Vision/Alamy; T, ©Craig Tuttle/Corbis. 636: ©G. Thomas Bishop/Custom Medical Stock Photo. 637: ©Vienna Report Agency/Sygma/Corbis. 639: BL, ©Chase Studio/Photo Researchers, Inc.; BR, ©Chase Studio/Photo Researchers, Inc.; T, ©Craig Tuttle/Corbis. 640: L, ©Perennou Nuridsany/Photo Researchers, Inc.; R, ©Roland Birke/Peter Arnold Inc. 641: ©Neil Lucas/npl/Minden Pictures. 643: B, ©Howard Rice/Photolibrary Group; B, Inset, ©David T. Webb, Botany, Univ. of Hawaii. 644: ©J S Sira/Garden Picture Library/Photolibrary Group. 646: ©Craig Tuttle/Corbis. 647: TL, ©M. Gabriel/Peter Arnold Inc.; BL, ©BARRY RUNK/Grant Heilman Photography; TM, ©Walter H. Hodge/Peter Arnold Inc.; RT, ©Manfred Kage/Peter Arnold Inc.; R, near T, ©Peter Chadwick/DK Images; BM, ©Runk/Schoenberger/Alamy; R column, near B, ©CMSP; R column, B, ©Runk/Schoenberger/Alamy; BR, ©Vienna Report Agency/Sygma/Corbis. 648: T, ©Perennou Nuridsany/Photo Researchers, Inc.; B, ©Vienna Report Agency/Sygma/Corbis. 650: B, Ed Reschke/PhotoLibrary Group, Inc.; T, ©Craig Tuttle/Corbis. 651: TL, ©Peter Chadwick/DK Images; T, ML, ©Peter Chadwick/DK Images; T, MR, ©Peter Chadwick/DK Images; TR, ©Peter Chadwick/DK Images; B, ©Georgette Douwma/Getty Images. 652: T, ©David L. Dilcher and Ge Sun; BL, ©Sangtae Kim, University of Florida. Photo courtesy the Botanical Society of America; B, near L, ©Pavel Bortel/istockphoto.com; BM, ©The Garden Picture Library/Alamy; BR, ©Skip ODonnell/istockphoto.com; B, near R, ©Julien Grondin/istockphoto.com. 653: ©Vienna Report Agency/Sygma/Corbis. 655: courtesy of Marya C. Roddis. 657: ©Perennou Nuridsany/Photo Researchers, Inc. 659: ©Photo Archives of the South Tyrol Museum of Archaeology. 660: ©Anna Yu/istockphoto.com. 662–663: Perennou Nuridsany/Science Photo Library/Photo Researchers, Inc. 663: T, Ted Mead/Photo Library. 664: B, Ted Mead/PhotoLibrary; T, Perennou Nuridsany/Science Photo. 666: ©Ray F. Evert, University of Wisconsin, Madison. 667: L, Biophoto Associates/Photo Researchers, Inc.; ML, Biophoto Associates/Photo Researchers, Inc.; MR, Biophoto Associates/Photo Researchers, Inc.; TR, Judy Lawrence/Alamy; B, Ted Mead/PhotoLibrary. 668: T, Ray F. Evert, University of Wisconsin; B, Ray F. Evert, University of Wisconsin. 669: BL, Runk Schoenberger/Grant Heilman Photography; BR, Derek Croucher/Alamy; T, Perennou Nuridsany/Science Photo. 671: Ted Mead/PhotoLibrary. 674: B, Martine Mouchy/PhotoLibrary Group; T, Perennou Nuridsany/Science Photo. 675: L, Ed Reschke/Peter Arnold; R, Ed Reschke/Peter Arnold. 676: Ted Mead/PhotoLibrary. 678: Manfred Kage/Peter Arnold. 680: B, Ted Mead/PhotoLibrary; T, Perennou Nuridsany/Science Photo. 682: Biophoto Associates/Photo Researchers, Inc. 683: B, Nigel Cattlin/Photo Researchers, Inc.; T, Photo by John Moore ©Pearson Education. 684: BL, Garden World Images/AGE Fotostock; TR, Peter Miller/Getty Images; BR, Muriel Hazan/BIOS/Peter Arnold; TL, David Kirkland/PhotoLibrary. 685: Perennou Nuridsany/Science Photo. 686: Pearson Education/PH School. 691: Ted Mead/PhotoLibrary. 694–695: Biophoto Associates/Photo Researchers, Inc. 695: TR, ©Martin Perez/istockphoto.com. 696: T, Biophoto Associates/Photo Researchers, Inc. 697: TR, ©James Strawser/Grant Heilman Photography; L, ©Mark Bolton/Getty Images; BR, ©Brian Durell/Superstock; M, ©James Urbach/SuperStock. 698: Pearson Education/PH School. 700: R, ©Nature Production/Minden Pictures; L, Wermter, C./Peter Arnold Inc. 702: Inset, T, ©Ed Reschke/Peter Arnold Inc.; Inset, B, ©Michael P. Gadomski/Photo Researchers, Inc.; Background, ©Richard Cummins/SuperStock. 703: Inset R, ©National Trust Photographic Library/Stephen Robson/The Image Works”; Bkgrnd, ©BIOS Bios - Auteurs Lafranchis Tristan/Peter Arnold Inc.; BL, ©Martin Perez/istockphoto.com. 704: BL, ©Westend61/Alamy; BR, ©Eisenhut & Mayer/Stockfood/Getty Images; RT, ©Corbis/SuperStock; T, Biophoto Associates/Photo Researchers, Inc. 705: L, ©Thomas Mangelsen/Minden Pictures; R, ©Peter Lilja/age Fotostock; M, ©Werner H. Muller/Peter Arnold Inc. 706: ©Martin Perez/istockphoto.com. 708: Biophoto Associates/Photo Researchers, Inc. 710: L, ©Walter Chandoha Photography; R, ©Walter Chandoha Photography. 711: ©Martin Perez/istockphoto.com. 712: Martin Shields/Photo Researchers, Inc. 714: Background, ©Mark Bolton/Corbis; Inset, ©GRANT HEILMAN/Grant Heilman Photography. 715: B, ©Keren Su/CORBIS; T, Biophoto Associates/Photo Researchers, Inc. 716: L, Nicolle Rager Fuller, National Science Foundation; R, The Art Archive/Government Palace Tlaxcala Mexico/Dagli Orti. 717: B, ©Pearson Education Curriculum Group; TR, ©Bill Barksdale/Corbis; TL, Nicolle Rager Fuller, National Science Foundation. 718: BR, ©Brand X/SuperStock; B, near R, ©Mats Tooming/istockphoto.com; BL, ©Christophe Boisvieux/Corbis; TL, ©Ingram Publishing/SuperStock; TR, Photo by Heather Wright. ©Pearson Education. 719: LM, ©Purestock/SuperStock; RM, ©Brand X/SuperStock; T, ©Visual Arts Library (London)/Alamy; B, EITAN ABRAMOVICH/Getty Images. 723: ©Martin Perez/istockphoto.com. 727: ©Martin Harvey/Corbis. 728–729: Jeff Hunter/The Image Bank/Getty Images. 729: Bkgrnd, T, Kelly McGann Hebert; T, Inset, Kelly McGann Hebert. 730: Jeff Hunter/The Image Bank/Getty Images. 731: BL, (c) Burke/Triolo Productions/Brand X/Corbis; BR, BIOS/Peter Arnold, Inc.; Bkgrnd, T, Kelly McGann Hebert; T, Inset, Kelly McGann Hebert. 732: L, Tierbild Okapia/Photo Researchers, Inc.; R, ©Frans Lanting/Minden Pictures. 735: ©M. FOGDEN/OSF/Animals Animals - Earth Scenes. 736: Courtesy, Dr. Scottie Yvette Henderson. 737: R, Michael Durham/Nature Place Library; Jeff Hunter/The Image Bank/Getty Images. 742: Inset, Kelly McGann Hebert; Bkgrnd, Kelly McGann Hebert. 743: B, BIO Klein & Hubert/Peter Arnold, Inc.; T, Michio Hoshino/Minden Pictures. 745: ©Frans Lanting/Minden Pictures. 747: B, ©Peter Parks/Image Quests Marine; Bkgrnd, T, Kelly McGann Hebert; T, Inset, Kelly McGann Hebert. 750–751: Editions Xavier Barral. Photo ©Patrick Gries. 751: TR, O. LOUIS MAZZATENTA/National Geographic Society. 752: B, Photo courtesy of Shuhai Xiao at Virginia Tech; T, Editions Xavier Barral. Photo ©Patrick Gries. 753: Inset, B, ©Chip Clark/National Museum of Natural History/Smithsonian Institution; T, O. LOUIS MAZZATENTA/National Geographic Society; B, ©Pearson Education/Patrice Rossi Calkin. 754: T, Waterframe/Alamy; B, ©Fred Bavendam/Minden Pictures. 755: BM, ©DAVID M. DENNIS/Animals Animals - Earth Scenes; B, ©JOHN ANDERSON/Animals Animals - Earth Scenes; TM, ©Kim Taylor/Dorling Kindersley; T, ©Ben Twist/istockphoto.com. 756: T, ©Dr. David Wachenfield/Minden Pictures; B, ©Roger Steene/imagequestmarine.com. 757: B, Simon Conway Morris, University of Cambridge; T, Editions Xavier Barral. Photo ©Patrick Gries. 759: T, ©Chip Clark; B, ©Mike Parry/Minden Pictures. 760: ©Enzo & Paolo Ragazzini/CORBIS. 761: ©Anne Ryan/Polaris Images. 762: O. LOUIS MAZZATENTA/National Geographic Society. 763: B, DeAgostini/Getty Images; T, Natural History Museum/DK Images. 764: ©Frans Lanting/Minden Pictures. 765: ©Profimedia/SuperStock; T, Editions Xavier Barral. Photo ©Patrick Gries. 768: ©John Reader/Photo Researchers, Inc. 769: B, ©Photo by Craig Hartley; T, Sarah Leen and Rebecca Hale/National Geographic Society. 772: ©SuperStock, Inc./SuperStock. 773: B, Andrew Heavens; MB, ©John Reader/Photo Researchers, Inc.; MR, ©Patrick Robert/Corbis; T, ©John Reader/Photo Researchers, Inc.; ML, ©John Reader/Photo Researchers, Inc. 775: ©Chip Clark. 777: B, ©Jany Sauvanet/Photo Researchers,; T, O. LOUIS MAZZATENTA/National Geographic Society. 780–781: ©Richard Du Toit/Minden Pictures. 781: TR, ©Anastasiya Maksymenko/istockphoto.com. 782: T, ©Richard Du Toit/Minden Pictures; R, ©Radius Images/Photolibrary Group. 783: BL, Nancy Sefton/Photo Researchers, Inc.; BR, ©Fred Bavendam/Minden Pictures; TR, ©PHONE PHONE - Auteurs Danna Patricia/Peter Arnold Inc.; TL, ©Hiroya Minakuchi/Minden Pictures. 786: ©Kim Karpeles/age fotostock. 787: B, ©Paul Nicklen/National Geographic/Getty Images; T, ©Richard Du Toit/Minden Pictures. 791: B, ©B. RUNK/S. SCHOENBERGER/Grant Heilman Photography; T, ©Richard Du Toit/Minden Pictures. 793: T, ©Anastasiya Maksymenko/istockphoto.com; B, ©David Kjaer/Minden Pictures. 794: B, ©Masa Ushioda/Image Quest Marine; T, ©Richard Du Toit/Minden Pictures. 795: B, ©Anastasiya Maksymenko/istockphoto.com; T, ©Tom Vezo/Minden Pictures. 798: ©Flip De Nooyer/Minden Pictures. 799: Daniel S. Cutler. 800: ©Fred Bavendam/Minden Pictures. 803: ©Anastasiya Maksymenko/istockphoto.com. 806–807: ©David Tipling/Minden Pictures. 807: TR, ©2002 Masa Ushioda/Image Quest 3-D. 808: R, ©Dmitry Ersler/istockphoto.com; L, ©David Tipling/Minden Pictures.
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