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Nathan Ellgren/APDrinking water around the District of Columbia hasn't been contaminated. But scientists say the environmental damage could be severe. -
Lydia Schweickart for NPRKeeping students off their devices is the new norm in many schools. We talked to students and educators at one Kentucky school to see how it's working.
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Easier than a blood test, saliva tests have the potential to detect cavities, infections and even cancer. But a lack of insurance coverage and other obstacles stand in the way of wider use.
