Could Earth be a cosmic sanctuary for observation? The Zoo Hypothesis suggests so.
In 1950, Italian-American physicist Enrico Fermi famously asked, “Where is everybody?” The question has since become the basis of the Fermi Paradox, addressing the conflict between the high probability of extraterrestrial life and the complete lack of evidence for its existence. Several hypotheses have been proposed to explain this, including the Zoo Hypothesis, first introduced in 1973 by Harvard astrophysicist John A. Ball. This theory posits that advanced alien civilizations may know of Earth and its inhabitants but choose to avoid contact, allowing humanity to develop naturally without interference.
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