Signal A Running Record of Findings from the Internet / August 22, 2026

The 2,000-Year-Old Cliff Paintings That Stayed Red Because They Were Made With Blood

New analysis of the Zuojiang Huashan murals in Guangxi finds animal blood, and possibly blood from childbirth, worked into the pigment as a binder alongside clay and lime.

Read the story By Hadani Ditmars · The Art Newspaper
Huashan rock art in Guangxi, China
Huashan rock art in Guangxi, China
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