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Nitrate contamination of well water has been a decades-long problem in the San Joaquin and Salinas valleys — and now stormwater has flushed more fertilizer and manure into aquifers.

K. Barry Sharpless from Scripps Research in La Jolla won the Nobel Prize in Chemistry for the development of click chemistry and bioorthogonal chemistry.

NPR talked to hundreds of people over the course of the pandemic. As the emergency declaration ends on May 11, we asked some of them for their reflections on the past three tumultuous years.

Republican Party divisions over who would lead the House, debates over the debt ceiling and other conflicts have revived a years-long conversation about what it even means to be conservative.

People who get regular short bouts of exercise are less likely to develop diabetes, dementia and heart disease, a new study finds. And an added benefit - regular movement puts people in a better mood.

This holiday season, the San Diego Model Railroad Museum invites you to enjoy six model railroad exhibits, including a fully decorated Toy Train Gallery inspired by Christmases past. The museum, located in the heart of Balboa Park, is open to train lovers of all ages from Thursday - Sunday from 11 a.m. – 4 p.m. Visit www.sdmrm.org to purchase your admission tickets or donate to the museum. Admission: Free (children 3 and under) up to $13.50. We share a parking lot with the Fleet Science Center. Our major cross street is Park Blvd and Space Theater Way. For more information, visit www.sdmrm.org or call 619-696-0199 San Diego Model Railroad Museum on Facebook+ Instagram + follow @sdmodelrailroad on Twitter

Voters will decide whether or not to allow sports betting in November. Propositions 26 and 27 would both make sports betting legal in California.

For years, chocolate-lovers have pointed to studies suggesting compounds in cocoa may be good for heart health. But some of the recent evidence comes from flavanol-rich cocoa, not from candy bars

Getting a sense of falsehoods online might sound straightforward, but it isn't. Researchers use state-of-the-art algorithms but it also comes down to lots of scrolling and reading.

Two San Diego County teachers were among 117 teachers, mentors and mentoring organizations who received Presidential Awards for Excellence in Mathematics and Science Teaching or Mentoring from President Joe Biden Tuesday.