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Researchers with the Boulder Atomic Clock Optical Network Collaboration are one step closer to replacing the current atomic clock and officially redefining the second.

Buildings account for about 12% of U.S. greenhouse gas emissions. Massachusetts is trying to reduce that by retrofitting the state's iconic triple-deckers.

After a drawn out jury-selection process, the opening arguments began for the first day of the Derek Chauvin trial, the former police officer accused of killing George Floyd.

In the aftermath of the Jan. 6 insurrection at the U.S. Capitol, a growing number of lawmakers are calling for a revamp of U.S. policy to better target domestic terrorists.

Officials say expanding offshore wind will create tens of thousands of jobs and help reduce climate warming emissions. Multiple departments will coordinate to sell new leases and approve permits.

Scott Weidensaul has spent decades studying bird migration. "There is a tremendous solace in watching these natural rhythms play out again and again," he says. His new book is A World On the Wing.

"Just please hold on a little while longer," said Dr. Rochelle Walensky, warning of a possible fourth surge. U.S. coronavirus cases are up 10% over the previous week.

Opening arguments and witness testimony on the killing of George Floyd began 10 months after videos of his death sparked outrage and protests against racial inequality.

Pitmaster Rodney Scott talks with NPR's Steve Inskeep about his lifelong journey as a chef, and his debut cookbook: Rodney Scott's World of BBQ: Every Day Is a Good Day: A Cookbook.

The pandemic has meant life or death for cultural centers across the country. But it's been especially tough on small museums.