170mm x 244mm Collerton c10. tex V3-11/21/2014 5:28 P. M. Page 247 10. 4 EXTENSIONS OF THE MODEL 247 Figure 10. 26 Pech-Merle cave art (c25,000BP). Figure 10. 27 Chauvet Cave Art (c 30,000BP). Source: Reproduced with permission of Kersti Nebelsiek/Wikimedia Commons/Public Domain.