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Comment by rwmj | Hacker News Reader

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This was proposed by Carl Sagan in the 1960s: https://ui.adsabs.harvard.edu/abs/1961Sci...133..849S/abstra... https://www.jstor.org/stable/1706530

Damn, oh well. Thanks for the link!

Unfortunately the full article is annoyingly still paywalled (61 years after publication).

Google offers this download link for the PDF, works for me: https://canvas.harvard.edu/files/1871005/download?download_f...

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