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  1. Lawmakers Weigh Pros And Cons Of Mandatory Screening For Postpartum Depression
    California's legislature will soon take up a bill requiring doctors to screen new mothers. Many doctors oppose the idea, and similar laws elsewhere haven't increased the number of moms treated.
  2. Are There Risks From Secondhand Marijuana Smoke? Early Science Says Yes
    Now that marijuana is legal in more than 20 states, we all may be exposed to more marijuana on the street. Researchers warn that secondhand smoke from pot poses risks to the heart, lungs and arteries.
  3. Biologists Trace Genetic Roots Of Evolution, One Cell At A Time
    E.coli bacteria, each cell trapped in a tiny tube, are giving researchers the chance to study the pace and effects of single genetic mutations. Most mutations, the scientists find, aren't harmful.
  4. Live High Definition Video From Mars? NASA Is Getting Ready
    NASA is building a new space-based laser communication that will allow live, high-definition video from Mars and beyond — something that's not possible with standard radio equipment.
  5. Hearts Get 'Younger,' Even At Middle Age, With Exercise
    As early as your mid-40s, especially if you're sedentary, your heart muscle can show signs of aging, losing its youthful elasticity and power. But moderately strenuous exercise can change that.
  6. Study: How Arming Teachers Can Put Students Of Color At Greater Risk
    Some of the concern about Florida's law allowing teachers to be armed is based on a 2014 study by Center for Policing Equity's Phillip Atiba Goff. Goff talks to NPR's Michel Martin about his research.
  7. Questions And Answers About Opioids And Chronic Pain
    Are opioids the best way to manage long-term pain? NPR's Ari Shapiro talked with Dr. Ajay Wasan, a pain specialist at the University of Pittsburgh Medical Center, to find out.
  8. Tattoo You: Immune System Cells Help Keep Ink In Its Place
    When you get a tattoo, your body mounts a battle against the ink. So how do ankle flowers and bicep hearts stick around so long? Researchers took a look at specialized cells that gobble up the ink.
  9. New Research Claims Bones Found 80 Years Ago On Pacific Atoll Likely Amelia Earhart's
    Richard Jantz, a forensics expert at the University of Tennessee, reanalyzed measurements from the bones. He says they are female and the right size to be Earhart's. But questions linger.
  10. Sorry, Adults, No New Neurons For Your Aging Brains
    The brains of birds and mice continue to produce new nerve cells in the hippocampus throughout life. But research now suggests the human brain stops doing this around adolescence.
  11. Patients Like Hospital Care At Home, But Some Insurers Are Skeptical
    Some health systems are encouraging selected emergency room patients who are sick but stable and don't need intensive, round-the-clock care to opt for hospital-level care at home, instead.
  12. Mysteries of the Moo-crobiome: Could Tweaking Cow Gut Bugs Improve Beef?
    Microbe-free bovine life would be rough. Cows rely on single-cell accomplices for their digestion, so scientists are looking for ways to use these bugs to improve cows' eating and burping habits.
  13. Hidden Brain: Relationship Between Having Babies And The Economy
    Americans tend to have more children in a strong economy. Research suggests that conceptions might be a leading economic indicator — meaning declines in conceptions can predict the next downturn.
  14. Grass Is Back In The Chesapeake, And Crabs Will Follow
    In the Chesapeake Bay, underwater seagrass beds are growing, sheltering crabs and fish. The long-awaited recovery depends on efforts by farmers to prevent nutrients from polluting the giant estuary.
  15. Family Tree Goes Back 11 Generations, Includes 13 Million People
    Thirteen million people and 11 generations later, researchers have mapped out what may be the largest family tree to date.
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