Ancient Chinese Rock Paintings Preserved by Postpartum Blood
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Scientists have discovered that postpartum blood was used as a binding agent in ancient Chinese rock paintings, preventing them from fading for over 2000 years. The study, published in the Journal of Archaeological Science, found that maternal proteins in the blood initiated a biomineralization process, creating a durable bond between the pigments and the cliff face. This combination of ritual practice and practical chemistry has preserved the vibrant paintings at the Zuojiang Huashan Rock Art site in southern China.
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