NPR's A Martinez speaks with tech entrepreneur Bryan Johnson about the Netflix documentary "Don't Die: The Man That Wants To Live Forever," which portrays his quest to slow aging.

A team of scientists has shown it's possible to reduce inflammation in rheumatoid arthritis by stimulating the vagus nerve.

Can the president freeze funds already promised by Congress? NPR's Michel Martin speaks to Gillian Metzger, legal scholar at Columbia University, about President Trump testing the limits of his power.

As families try to adjust to a new normal after the Los Angeles wildfires, some parents and caregivers are noticing kids processing through make-believe.

Security in New Orleans will be tight this week as the city gets ready to host the Super Bowl following the New Years Day truck attack on Bourbon Street that killed 14 people and injured dozens.