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19805

A better title for this article might be “Mendelian Cowbirds.” By reducing the number of successful hatches and subsequent offspring of any parent birds that kick the interlopers’ eggs out of their nests, the cowbirds are (unintentionally) reducing the expression of that behavior in the next generation of potential foster families. W. Gregory StewartLos Angeles, […]

Living Long on Less? Mouse and human cells respond to slim diets

Some animals live longer on reduced-calorie diets, and in a recent experiment people on such diets had many of the cellular changes that those long-lived animals did.

19804

What were the ages of the people in the study? Henry Dieter WeinschelLas Cruces, N.M.