In his book Origin of Species, Charles Darwin stated: “Natural selection acts only by taking advantage of slight successive variations; she can never take a... leap. ”
Dalam bukunya Origin of Species, Charles Darwin menyatakan, ” Seleksi alam sepenuhnya bergantung pada perubahan - perubahan kecil yang silih berganti; dia [alam] tidak pernah bisa melakukan... lompatan. ”