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UAS test missions performed to get a sense of what drones are capable of.

Mask mandates and other interventions can help stop a surge, even where vaccination rates are low, say scientists who've reviewed states' data. When the measures start and how long they last matters.

The massive storm hit near the heart of Gulf oil production and refining, which will affect prices for a few weeks. But nobody expects the kind of price spike the U.S. saw after Hurricane Katrina.

In Nevada, tribal opposition to a proposed lithium mine is testing the White House's pledge to electrify America's transportation system and give more of a voice to indigenous people in federal lands.

In Middle Tennessee, rescue crews are searching for at least a dozen people who are unaccounted for after heavy rain and flooding. The death toll is at 22.

Ford Motor Company plans to roll out a fleet of hybrid cars, and it's also developing new ride-hailing services. This is Ford's latest effort to not just sell cars, but drive people and gain entry into the ride-hailing economy dominated by Uber and Lyft. NPR's Ari Shapiro talks with the Ford CEO Mark Fields about the company's move into other markets and the future of the auto industry.

University scientists and former state employees say Florida Gov. Rick Scott's administration has directed them to avoid using the phrase "climate change." Scott denies the charge.

Sleepwalking is common among children, and for many, it persists into adulthood. Though it's still not well understood, scientists have identified several factors that can trigger episodes of sleepwalking.

A new study finds that for more than 70% of all U.S. counties, urban temperatures are higher in neighborhoods that have low-income people and communities of color.

Environmental advocates are worried that many climate change proposals got pushed out of a bipartisan infrastructure deal. But the White House insists they'll be in another big spending measure.