Observatory: Orca Mothers Coddle Adult Sons, Study Finds

[unable to retrieve full-text content]Female killer whales stop reproducing by their 40s but can live into their 90s. New research suggests that the prolonged menopause lets them focus on caring for their sons.

Source: http://www.nytimes.com/2012/09/18/science/orca-mothers-coddle-adult-sons-study-finds.html?partner=rss&emc=rss

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