# This Rock Art in China Has Remained Bright Red for Nearly 2,000 Years. How? The Secret Ingredient Might Be Blood

- Source: Smithsonian Smart News (smithsonianmag.com), Unknown, treat as all rights reserved
- By: Sarah Kuta
- Published: 2026-08-25
- Read it at the publisher: <https://www.smithsonianmag.com/smart-news/this-rock-art-in-china-has-remained-bright-red-for-nearly-2000-years-how-the-secret-ingredient-might-be-blood-180989389/>
- Why the text is not here: The license for this work has not been established, so it is described here and read at the publisher.
- Page: <https://sprout.rootsofreason.org/r/smithsonian-smart-news/this-rock-art-in-china-has-remained-bright-red-for-nearly-2-000-years>