Evolutionary biologist who, with B. Rosemary Grant, followed Darwin's finches over decades. Their measurements linked changing environments with repeated changes in body and beak traits, showing why long-term evolution need not follow one persistent direction.[ref]
Unpredictable evolution in a 30-year study of Darwin's finches by Peter R. Grant and B. Rosemary Grant. Author list and described study
Portrait of Peter R. Grant
. David Craig. CC BY-SA 2.0, via Wikimedia Commons. Source. Articles by others on the same topic
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