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世纪法国手稿中的“死亡与死去”：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.图示：全球大型动物数量饼图。
12. Detail from Michelangelo Buonarroti (1475–1564), the Sistine Chapel, Vatican City © LessingImages.
13. © Balint Porneczi/Bloomberg via Getty Images.
14.左图：© Bergserg/Shutterstock.com.右图：© 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.左图：© Richard Nowitz/Getty Images.右图：© 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.数据来源：Emission Database for Global Atmospheric Research (EDGAR), European Commission.
27. © Bibliothèque nationale de France, RC-A-02764,Grandes Chroniques de France de 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.左图：© Fototeca Gilardi/Getty Images.右图：© 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.图示：意识的频谱。
49. © ITAR-TASS Photo Agency/Alamy Stock Photo.
50. © Jonathan Kirn/Getty Images.