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. 2021 Jun 22;26(13):3813. doi: 10.3390/molecules26133813

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Pigments used in some caves with cave paintings made during the Middle Stone Age. (A) Ochre pigment in Bombs Cave, Southern Cape Town, South Africa (https://www.nationalgeographic.com/science/article/news-ancient-humans-art-hashtag-ochre-south-africa-archaeology Accessed on: 28 May 2021) [59]. (B) Coal pigment in Chauvet Cave, France (https://www.newyorker.com/magazine/2008/06/23/first-impressions Accessed on: 28 May 2021) [58]. (C) Pettakere Cave, Maros, Indonesia (https://reydekish.com/2015/09/21/cuevas-de-indonesia/ Accessed on: 28 May 2021). (D) Ochre pigment in El Castillo cave, Spain (https://www.efetur.com/noticia/expresiones-ser-human/ Accessed on: 28 May 2021), (https://www.donsmaps.com/castillo.html Accessed on: 28 May 2021). (E) Coal pigment in the Mona Island Cave, Puerto Rico [60].