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Are Earths rare in the Universe?

Daniel and Kelly’s Extraordinary Universe

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Exploring the Fermi Paradox and the Rare Earth Hypothesis

This chapter examines the Fermi paradox, addressing the puzzling lack of evidence for extraterrestrial life despite favorable odds. It also discusses self-replicating alien robots and the rare earth hypothesis, suggesting reasons why intelligent life capable of interstellar contact may be incredibly rare.

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