The largest study of same-sex sexual behavior finds the genetics are complicated, and social and environmental factors are also key

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US scientists say their blood test can be 94% effective in spotting those at risk of the illness

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They float in ordinary lab dishes, no more eye-catching than a plain beige lentil, and often so delicate they shrivel up and die if temperatures or food or the very air around them deviates from Goldilocks perfection. No wonder scientists coddle such “organoids”

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Victoria Gray is waiting patiently in a hospital room at the Sarah Cannon Research Institute in Nashville

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As opioid addiction and deadly overdoses escalated into an epidemic across the U.S., thousands of surgeons continued to hand out far more pills than needed for postoperative pain relief, according to a KHN-Johns Hopkins analysis of Medicare data

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The Medicaid work requirement plan devised by Arkansas and approved by the Trump administration backfired because it caused thousands of poor adults to lose coverage without any evidence the target population gained jobs, a new study finds

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To see if they’re safe for us. Gene-editing company eGenesis is now carrying out experiments to help solve a critical shortage of human organs available for transplant

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Trials of vaccines and treatments have not included enough female participants. Now that scientists are exploring possible cures, the need to enroll women is greater than ever

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