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In a new study, an easy-to-use app did just as good a job as the machines in an eye doctor's office. That's a boon for people in low-income countries — and really for anyone with vision issues.
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Many historians have debated how our country might be different today if Lincoln had lived to see the country through the critical Reconstruction period…
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At 59 years old, Michael Froome just got a new heart. His problem goes back 20 years after a chest pain led his doctor to order a cardiac stress test. ...