- 6.1Photograph of Chauvet Cave: Handprints. Photograph: Axel Boldt. Retrieved from: Wikimedia Commons. Image is in the public domain. 125
- 6.2Photograph of Chauvet Cave: Lions. Photograph: Axel Boldt. Retrieved from: Wikimedia Commons. Image is in the public domain. 129
- 6.3Photograph of Girl Eating Oysters by Jan Steen.Mauritshuis, The Hague. Retrieved from: Wikimedia Commons. Used with permission. 136
- 6.4Water Lilies, by Claude Monet. Retrieved from: Wikimedia Commons. Image is in the public domain. 137
- 6.5The Invention of Drawing [L’origine della pittura], by Giorgio Vasari (studio of?). Retrieved from: Wikimedia Commons. Image is in the public domain. 141
- 6.6Drawing Hands, by M.C. Escher. Retrieved from: Wikimedia Commons. Image is in the public domain. 142
- 10.1–10.2, 10.7The Age of Stupid. Director: Franny Armstrong. Year of publication: 2009. 213, 214, 226
- 10.3–10.6Merchants of Doubt. Director: Robert Kenner. Year of publication: 2014. 222–224
- 11.1–11.4, 11.12–11.16The Unknown Known. Director: Errol Morris. Year of publication: 2013. 239–245
- 11.5–11.11The Fog of War: Eleven Lessons from the Life of Robert S. McNamara. Director: Errol Morris. Year of publication: 2003. 241–244