If we weren’t the first industrial civilization on Earth, would we ever know?

If we weren’t the first industrial civilization on Earth, would we ever know?

- January 25, 2020

Article URL: https://www.technologyreview.com/s/610886/if-we-werent-the-first-industrial-civilization-on-earth-would-we-ever-know/

Comments URL: https://news.ycombinator.com/item?id=22150137

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