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In mice, the HIV drug maraviroc restored a system that links new memories that are made around the same time. The finding could help treat memory problems in people.

America runs on diesel. It keeps freight moving, factories humming and farmers planting. But a surge in diesel prices is making everything more expensive.

NASA began "sonifying" its famous photos of outer space to help people who are visually impaired enjoy the images. Recently, it recreated the sound of a black hole 240 million light-years away.

Abbott says the information that he provided at a press conference two days ago was a recitation of what law enforcement had told him in a room beforehand.

An ancient Roman tablet discovered in Northern England near Hadrian's Wall shows a graffiti message that feels... not so ancient.

NPR's Ari Shapiro talks with Mick North, founding member of Gun Control Network and the father of one of the children killed at Dunblane Primary School in Scotland.

"It'd be great if you had some help — but I can assure you those kids need help more than you need help," says Steve Ijames, who trains police agencies on active-shooter situations.

NPR's Ailsa Chang talks with Texas Rep. Joaquin Castro, a Democrat, about his request that the FBI investigate the timeline of law enforcement response at the Uvalde school shooting.

For the last two years, A Night of Remembrance has been been taped because of the pandemic. There will be special tributes for Gen. Colin Powell, Gold Star families and women who served in WWII.

Fifth-grade teacher Lindsey Vaccarezza talks about how she and her elementary school are responding to this week's massacre in Uvalde.