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No traces of modern civilization left after a couple hundred years? Are the mountains of plastic in the planets testicles going to degrade in less time than the USA has existed? What of the monolithic concrete structures, millions of metallic motor vehicles, the snaking networks of asphalt roads, and the mountains of explosive devices still left in the soil across many parts of the world? How about the radioactive materials that's trapped in burial sites packed beneath structures of concrete and leaded shielding? (Materials with half-lives longer than humanity has existed) Are those going to be completely wiped from existence in the time it took us to go from making the first petrol engine to creating dial-up internet?
We're STILL unearthing ruined cities, skeletons, and every day possessions from civilizations that existed for hundreds or thousands of years longer than the United States of America has existed for. Please link what sources made the claims you're regurgitating.
Edit: Fun profile name, by the way.
That's exactly what I'm saying. Humans have been genetically human for around 300,000 years.
This article mentions that plastic might take 1000 years to decompose in the ocean if we stop dumping it https://www.whoi.edu/ocean-learning-hub/ocean-facts/does-plastic-last-for-thousands-of-years-in-the-environment/
There are huge, almost geological time scales, that we have been human, and everywhere we look we find more evidence of earlier people, possibly even what we would call a civilization.
Also concrete doesn't last that long. That is why it was a big deal when we figured out roman "self healing" concrete.
Radioactive materials is the big one. That might be the only evidence of a civilization if it was old enough.
We don't have any evidence of organized civilizations older than around 5000bc I think, with gobekli tepe being an earlier potential civilization candidate.