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A new study shows people who are in the habit of climbing stairs are less likely to die from heart disease compared to those who don't. Stair climbers also had a slight boost in longevity.
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A trial for a mass environmental injury case begins in Hawaii on Monday, more than two years after a U.S. military facility poisoned thousands of people when it leaked jet fuel into drinking water.
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The federal government says it will restore grizzly bears to the North Cascades region in Washington state, where they have not been seen since 1996.
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A recent survey found that Americans' sleep patterns have been getting worse. Adult women under 50 are among the most sleep-deprived demographics.
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Health officials say there's very little risk to humans from the bird flu outbreak among dairy cattle, but there's still much they don't know. Here are four questions scientists are trying to answer.
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The Energy Department finalized rules that will ban fossil fuels in new and remodeled federal buildings by 2030.
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After studying various species earlier this month, some scientists now say they understand the origin of animal behavior during solar eclipses.
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Fifteen years after the EPA said greenhouse gasses are a danger to public health, the agency finalized rules to limit climate-warming pollution from existing coal and new gas power plants.
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The talks in Canada are not going well,and scientists and civil society groups say the U.S. is largely to blame.
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NPR's TED Radio Hour looks into the science of awkward psychological traits and the crossover between awkwardness and autism.