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![]() | Hawkes, Kristen | A reappraisal of grandmothering and natural selection | Kachel et al. [1] conclude from simulations of their agent-based model that fitness benefits from helpful grandmothers do not select for increased longevity. We studied their assumptions and model, ran further simulations and found flaws that are fatal to their test. Here, we explain four problems a... | 2011-01-01 |