(图片采自“The Cave Paintings of Lascaux: Field Museum”, 2013.02.19)
图1-3南非布隆伯斯洞穴出土岩画碎片 2
(图片采自Cristopher S. Henshilwood, Francesco d’Errico, Karen L. van Niekerk etc.: An Abstract Drawing from the 73,000-year-old levels at Blombos Cave, South Africa, Nature, Fig 2)