When do mothers need others?

8 mayo 2015

New research examines how mothers underwent a remarkable transition from the past – when they had one dependent offspring at a time, ended support of their young at weaning and received no help from others – to the present, when mothers often have multiple kids who help rear other children.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/ruWW_4AmSkk/150508140256.htm

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