Despite my cheech and chong wisecracks, I also am somewhat surprised by the usable material recovered.
Seems some materials are far more...durable that expected.
I can understand Mastodon/Sabre Tooth Tiger etc DNA frozen in permafrost for many thousands of years, but food residue exposed to air, is simply amazing.
Maybe that’s why the civilization died-off? Their collective gut couldn’t simply digest it.
Latest finding for Inca and Maya civilizations is that the mud they coated temples, homes, roads etc with, contained LIME, which poisoned their food growing fields, with so much rain, and they starved or left for other cities.