A heat-map showing the average distance residents live from their mothers.

New York Times staffers Quoctrung Bui and Claire Cain Miller report on why the average American's live less than 20 miles from their mother. 

Many Americans who live closer to their parent typically have lower income or are less educated, and adults have also become less mobile. Social scientist believe that this trend will continue because they baby boomers are needing more care as they get older. Only 20% of American's live more than a couple of hours from their parents. 

The United States offers less government help for caregiving than many other rich countries. Instead, extended families are providing it, whether they never moved apart, or moved back closer when the need arose.

The data reveal a country of close-knit families, with members of multiple generations leaning on one another for financial and practical support

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