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steve  ·  4412 days ago  ·  link  ·    ·  parent  ·  post: How long until the evidence of us is gone?

1. - Thousands.... probably tens of thousands of years.

2 - even longer - 50,000 years at least.

3 - at this point? never. I think we've made out mark.

My dad's a retired archaeologist, and he's coming through town this week. I'll ask him what he thinks about your questions.