1. Computer artwork © KTSDESIGN/Science Photo Library. 2.The Triumph of Death, c.1562, Bruegel, Pieter the Elder © The Art Archive/Alamy Stock Photo. 3. © NIAID/CDC/Science Photo Library. 4. Moscow, 1968 © Sovfoto/UIG via Getty Images. 5. 14世紀法國手稿中的“死亡與死去”：Pilgrimage of the Human Life, Bodleian Library, Oxford © Art Media/Print Collector/ Getty Images. 6. © CHICUREL Arnaud/Getty Images. 7. © American Spirit/Shutterstock.com. 8. © Imagebank/Chris Brunskill/Getty Images/Bridgeman Images. 9. © H. Armstrong Roberts/ClassicStock/Getty Images. 10. © De Agostini Picture Library/G.Nimatallah/Bridgeman Images. 11.圖示：全球大型動物數量餅圖。 12. Detail from Michelangelo Buonarroti (1475–1564), the Sistine Chapel, Vatican City © LessingImages. 13. © Balint Porneczi/Bloomberg via Getty Images. 14.左圖：© Bergserg/Shutterstock.com.右圖：© s_bukley/Shutterstock. com. 15. © Karl Mondon/ZUMA Press/Corbis. 16. Adapted from Weiss, J.M., Cierpial, M.A. & West, C.H., ‘Selective breeding of rats for high and low motor activity in a swim test: toward a new animal model of depression’,Pharmacology, Biochemistry and Behavior 61:49–66 (1998). 17.同上。 18. © 2004 TopFoto. 19. © NOVOSTI/AFP/Getty Images. 20. Rudy Burckhardt, photographer.Jackson Pollock and Lee Krasner papers, c.1905–1984.Archives of American Art, Smithsonian Institution.© The Pollock–Krasner Foundation ARS, NY and DACS, London, 2016. 21.左圖：© Richard Nowitz/Getty Images.右圖：© Archive Photos/ Stringer/ Getty Images.Image credits 429 22. Courtesy of the Sousa Mendes Foundation. 23. Courtesy of the Sousa Mendes Foundation. 24. © Antiqua Print Gallery/Alamy Stock Photo. 25. Woodcut from ‘Passional Christi und Antichristi’by Philipp Melanchthon, published in 1521, Cranach, Lucas (1472–1553) (studio of) © Private Collection/Bridgeman Images. 26.數據來源：Emission Database for Global Atmospheric Research (EDGAR), European Commission. 27. © Bibliothèque nationale de France, RC-A-02764,Grandes Chroniques de Francede Charles V, folio 12v. 28.手稿：Registrum Gregorii, c.983 © Archiv Gerstenberg/ullstein bild via Getty Images. 29. © Sadik Gulec/Shutterstock.com. 30. © CAMERIQUE/ClassicStock/Corbis. 31. © Jeff J Mitchell/Getty Images. 32. © Molly Landreth/Getty Images. 33. The Thinker, 1880–81 (bronze), Rodin, Auguste, Burrell Collection, Glasgow © Culture and Sport Glasgow (Museums)/Bridgeman Images. 34. © DeAgostini Picture Library/Scala, Florence. 35. © Bpk/Bayerische Staatsgemäldesammlungen. 36. Staatliche Kunstsammlungen, Neue Meister, Dresden, Germany © Lessing Images. 37. Tom Lea,That 2,000 Yard Stare, 1944.Oil on canvas, 36''x28''.LIFE Collection of Art WWII, U.S. Army Center of Military History, Ft.Belvoir, Virginia.©Courtesy of the Tom Lea Institute, El Paso, Texas. 38. © Bettmann/Corbis. 39. © VLADGRIN/Shutterstock.com. 40.Virgin and Child, Sassoferrato, Il (Giovanni Battista Salvi) (1609–85), Musee Bonnat, Bayonne, France © Bridgeman Images. 41. © Bettmann/Corbis. 42. © Jeremy Sutton-Hibbert/Getty Images. 43.左圖：© Fototeca Gilardi/Getty Images.右圖：© alxpin/Getty Images. 44. © Sony Pictures Television. 45. © STAN HONDA/AFP/Getty Images. 46. ‘EM spectrum’.Licensed under CC BY-SA 3.0 via Commons, https://commons.wikimedia.org/wiki/File:EM_spectrum.svg#/media/File:EM_spectrum.svg. 47. © Cornell Bioacoustics Research Program at the Lab of Ornithology. 48.圖示：意識的頻譜。 49. © ITAR-TASS Photo Agency/Alamy Stock Photo. 50. © Jonathan Kirn/Getty Images.