0. In his 1863 Evidence as to Man's Place in Nature, Darwin's friend Thomas Huxley exaggerated the size of the Gibbon while presenting the anatomical argument explicit in the above frontispiece.
1. The Ascent of Man, drawing by A. Busetto from Circa [http://www.ibc.regione.emilia-romagna.it/paleo/index.htm] www.kheper.net/evolution/ascentofman.html
2. A simplified version of this figure appears in the cover of the book El mono obeso by JE Campillo
3. From www.steinbergforcongress.com
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5. From Judge magazine, July 18, 1925, p. 2.
6. From the cover of The Economist Dec 24th 2005
7. by Peter Nicholson (www.nicholsoncartoons.com.au)
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10. by Forges
11. http://www.earlelouder.com/
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13. by Mackay, http://www.walksf.org/segways/
14. From the cover of Trends in Ecology and Evolution, volume 22 issue 3
15. From Al margen, 2007
16. byDonado
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18. Circular evolution
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20. Homo sapiens sapiens avatariensis (from: villainbaroque.wordpress.com/2008/06/17/the-dawning-of-the-age-of-the-avatar/)
21. (from: http://faculty.knox.edu/fmcandre)
22. Evolution of woman (caricatura.ru)
23. (from: http://www.3x6.net/vhoorl/)
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30.
31. by Dan Piraro (Bizarro.com)
32. from: http://vrm1979.deviantart.com
33. from: http://www.humerusonline.com
34. from:http://www.insideout-designs.com
35. by IMAGEZOO / SuperStock
36.
37. from http://blogs.publico.es/ciencias