1. puter artwork © KTSDESIGN/Sce Photo Library.
2.The Triumph of Death, c.1562, Bruegel, Pieter the Elder © The Art Archive/Alamy Stock Photo.
3. © NIAID/CDC/Sce Photo Library.
4. Moscow, 1968 © Sovfoto/UIG via Getty Images.
5. 14世纪法国手稿中的“死亡与死”：Pilgrimage of the Human Life, Bodleian Library, Oxford © Art Media/Print Collectetty Images.
6. © CHICUREL Arnaud/Getty Images.
7. © Ameri Spirit/Shuttersto.
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：全球型动物数量饼图。
12. Detail from Michelangelo Buonarroti (1475–1564), the Sistine Chapel, Vati City © LessingImages.
13. © Balint Porneczi/Blo via Getty Images.
14.左图：© Bergserg/Shuttersto.右图：© s_bukley/Shutterstock. .
15. © Karl Mondon/ZUMA Press/Corbis.
16. Adapted from Weiss, J.M., Cierpial, M.A. & West, C.H., ‘Selective breeding of rats fh 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。
18. © 2004 TopFot……（内容加载失败！）
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