Traces of blue indigo on 34,000-year-old grinding tools suggest new Paleolithic plant use scenarios

Submitted ⁨⁨2⁩ ⁨weeks⁩ ago⁩ by ⁨ZeroCool@lemmy.ca⁩ to ⁨archaeology@mander.xyz⁩

https://phys.org/news/2025-09-blue-indigo-year-tools-paleolithic.html