Rare Earth hypothesis

proper noun

The hypothesis that the evolution of life required an improbable combination of astrophysical and geological events and circumstances, and for this reason complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare.

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Meanings

proper noun
  1. The hypothesis that the evolution of life required an improbable combination of astrophysical and geological events and circumstances, and for this reason complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare.
Cite this entry
APA

Rare Earth hypothesis. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Rare%20Earth%20hypothesis

MLA

“Rare Earth hypothesis.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Rare%20Earth%20hypothesis. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Rare Earth hypothesis,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Rare%20Earth%20hypothesis.

Source: Rare Earth hypothesis on Wiktionary, CC BY-SA 4.0.