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They dote on their grandchildren, offer a treasure trove of wisdom and provide an invaluable babysitting service. But it seems grandparents have a more crucial role – survival of the species. Their practical and financial support helps keep youngsters fit and healthy, while their love and ability to listen helps children and teens get through difficult periods such as the divorce of their parents. The conclusions come from Swiss and Australian researchers who analysed previous studies from around the world to pin down the role of grandparents. Several studies have linked grandmothers, in particular, with survival of the species. | 
