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Punctuated equilibrium
/pˈʌŋktʃuːˌeɪtɪd ˌiːkwɪlˈɪbɹiəm/
/pˈʌŋktʃuːˌeɪɾᵻd ˌiːkwᵻlˈɪbɹiəm/
Punctuated equilibrium
01
a theory of evolution holding that evolutionary change in the fossil record came in fits and starts rather than in a steady process of slow change