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Citing satellite imagery, a submarine analyst says Russia's navy is deploying dolphins to defend a crucial base off Crimea. Russia and the U.S. have run marine-mammal training programs for decades.

Firefighting crews were battling to keep the fire in northern New Mexico, the largest fire burning in the U.S., from making another run across the state's drought-parched landscape.

The Department of Energy wants to clean up its aging underground tanks of high level nuclear waste. But environmental groups say the agency's plan to empty and seal the tanks isn't safe enough; it leaves behind shallow layers of radioactive sludge. NPR's David Kestenbaum reports.

NPR's Michel Martin speaks with Bowser about the rise in gun violence in American cities and possible solutions.

They say militaries devour resources, emit tens of millions of metric tons of carbon emissions every year, and are exempt from many environmental regulations and international climate accords.

Big dairy farms are profiting from California's tougher limits on greenhouse emissions. They're getting paid to capture methane from cow manure. But critics say the system subsidizes polluters.

NPR's Ari Shapiro speaks with journalist John Cannon about the dangers of destroying a hidden peatland in the Congo Basin that has locked in as much carbon dioxide as the world emits in three years.

Many Olympic athletes competing in Beijing face tracks and terrain they've never competed on before because of COVID-19 limitations. They are scrambling to learn the turf during test runs.

Simpsons creator is bringing America's favorite dysfunctional family to the multiplex. Why does the show still work? "People really, really resonate to the idea of darker emotions in something that is considered a very light medium."

A new survey shows that museum collections are deteriorating. More than 3,000 institutions participated in the study by ranking their own preservation practices, and the results were alarming.