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People are often told to walk 10,000 steps a day to be healthy. But if your goal is to avoid being crippled by knee arthritis, just 6,000 a day will to it, a study finds. And 3,000 is a good start.

NPR Media Correspondent David Folkenflik, Wired's Issie Lapowsky and Ethan Zuckerman of MIT discuss allegations of bias against Facebook and social media's role in the news business.

Terry McAuliffe, who is running for governor in Virginia, is slamming his GOP rival, Glenn Youngkin, for his former company's role in a controversy involving Taylor Swift's back catalog.

As news of the closing rippled far beyond the deli's home turf in Manhattan Friday, hundreds of people responded with sadness and disbelief.

The attack on Brazil's Congress was organized publicly online. Despite being on high alert, social media companies missed signs that their platforms were being used to plan violence.

NPR's Michel Martin speaks with journalist Steve Reilly about who is providing financial support to the protesters in the so-called Freedom Convoys in Canada.

Daily Beast Editor-in-Chief Tina Brown shares with Renee Montagne the best things she's been reading lately about seduction by Facebook and some altruistic acts of exposure.

When Iran's foreign minister confirmed a landmark nuclear deal, he made the announcement via Twitter. Most Iranians have a hard time accessing Twitter freely. David Greene talks to Babak Rahimi, associate professor of communication, culture and religious studies at the University of California, San Diego.

It's known that Russian groups used Facebook and other social media platforms to spread false information during the 2016 election, but now Russian bots are doing the same after the Florida shooting. So, how are tech giants thinking about tackling these issues and making sure the same thing doesn't happen in this year's midterm election?

Visa, MasterCard and some of the largest banks in the country have agreed to pay more than $6 billion to settle a lawsuit that claimed they conspired to fix credit card payment fees. The suit was brought on behalf of seven million merchants. The agreement could have wide-ranging implications for retailers and consumers. Steve Henn talks to Melissa Block.