Scientists let swordtail fish choose their mates for nine generations; males kept picking larger females while female preferences varied - The Times of India

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https://timesofindia.indiatimes.com/science/nature/scientists-let-swordtail-fish-choose-their-mates-for-nine-generations-males-kept-picking-larger-females-while-female-preferences-varied/amp_articleshow/134745500.cms