08/13/2026
This is just a stunning tribute to how revered women truly were and how sacred birth was (and still should be)!!
Roughly 1,900 red figures cover the cliffs above the Zuojiang River in Guangxi, southern China, and they've survived about 2,000 years of subtropical heat, humidity, torrential rain, and typhoons.
A July 2026 paper in the Journal of Archaeological Science explains how. Researchers ran proteomic analysis on fallen fragments and found the pigment sits in a thin engineered mortar of slaked lime, calcium phosphate, and blood proteins. The blood acts as a template for biomineralization, growing dense calcium crystals that fuse the color chemically to the limestone. The samples were bonded so tightly that the lab needed electric drills to pull them.
Both animal and human blood turned up, and human proteins dominated some samples. Two of them, prolactin-inducible protein and lactotransferrin, are tied to pregnancy and breastfeeding, and there was no casein to suggest added milk. From that the team proposed part of the blood came from postpartum bleeding, a hypothesis they frame with caution since the alkaline lime destroyed any recoverable DNA.
The art is attributed to the Luoyue people, ancestors of today's Zhuang, whose society some historical texts describe as matrilineal. Estimates put it at about 8 ml of blood per square meter across a panel that runs 170 meters wide and over 40 meters high. The site became a UNESCO World Heritage listing in 2016.
