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Can bright light at night lead to obesity?

(Reuters Health) Obesity rates may surge in places where artificial lights blaze all night compared to communities where people tend to live in darkness after the sun goes down, a recent study suggests.
To explore this connection, researchers analyzed U.S. military satellite images of nighttime illumination around the globe and country-level data from the World Health Organization (WHO) on the prevalence of overweight and obese people.
Artificial light at night contributed to excessive weight in men and women about as much as eating junk food, the research team reports
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