4.9万年前南非人已开始使用牛奶作画

An international research team led by the University of Colorado Boulder¹ and the University of Witwatersrand in Johannesburg, South Africa has discovered a milk-and ochre-based paint dating to 49,000 years ago that inhabitants may have used to adorn² themselves with or to decorate stone or wooden slabs³. While the use of ochre by early humans dates to at least 250,000 years ago in Europe and Africa, this is the first time a paint containing ochre and milk has ever been found in association with early humans in South Africa, said Paola Villa⁴, a curator at the University of Colorado Museum of Natural History and lead study author. The milk likely was obtained by killing⁵ lactating members of the bovid family such as buffalo⁶, eland, kudu and impala, she said.   "Although the use of the paint still remains⁷ uncertain, this surprising find establishes the use of milk with ochre well before the introduction of domestic cattle in South Africa," said Villa. "Obtaining milk from a lactating wild bovid also suggests that the people may have attributed a special significance and value to that product."   The powdered paint mixture was found on the edge of a small stone flake⁸ in a layer of Sibudu Cave, a rock shelter in northern KwaZulu-Natal, Africa, that was occupied by anatomically modern humans in the Middle Stone Age from roughly 77,000 years ago to about 38,000 years ago, said Villa. While ochre powder production and its use are documented in a number of Middle Stone Age South African sites, there has been no evidence of the use of milk as a chemical binding⁹ agent until this discovery, she said.   A paper on the subject was published online June 30 in PLOS ONE. Co-authors were from the Italian Institute of Paleontology in Rome, Italy; the University of Geneva in Switzerland; the University of Pisa in Italy; the University of Monte St. Angelo in Naples, Italy; and the University of Oxford¹⁰ in England. The excavation¹¹ was directed by Professor Lyn Wadley of the University of Witwatersrand, also a paper co-author.   Cattle were not domesticated¹² in South Africa until 1,000 to 2,000 years ago, said Villa. Wild South African bovids are known to separate from the herd¹³ when giving birth and usually attempt to hide their young, a behavior that may have made them easy prey¹⁴ for experienced Middle Stone Age hunters, she said.