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.

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. Biblioth que 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 Staatsgem ldesammlungen.

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.