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. 2011 May 18;108(23):9661–9666. doi: 10.1073/pnas.1015666108

Fig. 1.

Fig. 1.

Examples of line art. (A) Cave painting at Chauvet, France, ca. 30,000 B.C. (B) Aerial photograph of the picture of a monkey as part of the Nazca Lines geoglyphs, Peru, ca. 700–200 B.C. (C) Shen Zhou (A.D. 1427–1509): Poet on a mountain top, ink on paper, China (The Nelson-Atkins Museum of Art, Kansas City, MO). (D) Line drawing by 7-y-old I. Lleras (A.D. 2010).