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A roundup of key developments and the latest in-depth coverage of Russia's invasion of Ukraine.

Heading into national swimming championships, the University of Virginia relies on a mathematician, cameras and sensors to help each swimmer perform their best.

Russia's invasion of Ukraine sent ripples beyond the immediate conflict zone, breaking supply chains and creating food shortages as two of the world's biggest food exporters went to war.

By some estimates, there are millions of people working in an informal economy in Mexico. Many are street vendors who ply their trades in the neighborhoods of the capital. They have no access to loans or financial support.

A new FDA rule allows adults with perceived mild to moderate hearing loss to buy hearing aids over the counter. Efforts to make them more affordable and accessible have been in the works for years.

The cities of Clarksville and Richmond worked with Indiana University last year to find out what parts of those communities get the hottest and who is most vulnerable to extreme heat. Now they’ve come up with plans to “beat the heat.”

NASA's Johnson Space Center invited The Kitchen Sisters to visit its "hidden kitchen." On the eve of NASA's scheduled launch of space shuttle Atlantis, The Kitchen Sisters present a brief history of space food.

What was supposed to be a caving excursion in Missouri turned into a rescue mission after a dog was found curled up and malnourished about 500 feet into the cave system.

Under an agreement with the Justice Department, Lafarge also pleaded guilty to one count of conspiring to provide material support to designated foreign terrorist organizations.

Political rhetoric is dividing many Americans. But for those in refugee and immigrant communities, that language gets filtered through another layer of history and lived experience.