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When you get a tattoo, your body mounts a battle against the ink. So how do ankle flowers and bicep hearts stick around so long? Researchers took a look at specialized cells that gobble up the ink.

This weekend, most people in the U.S. will reset their clocks and spring forward. In Florida, there's a push to never fall back.

Europeans seem to be running later than usual recently, it's not their fault — it's the clocks.An electric grid linking 25 European countries, has experienced a shortage of power supply since mid-January. This power supply shortage has caused all the non-quartz electric clocks in Europe to slow down by almost six minutes over the past month and a half.

Guatemala is the site of a radical, internationally-led experiment in bringing the brutal and corrupt to justice. The project has had some breathtaking successes but is fighting to survive.

The adult film actress who claims she once had an affair with President Trump is suing him so she can tell her story, but Trump denies the claim.

Four days after a former Russian spy was poisoned by a nerve agent in the U.K., British authorities have yet to publicly accuse anyone of the attack. Yet speculation swirls about Russian involvement, and, as Luke Harding of The Guardian says, the poisoning looks very similar to previous Russian assassination attempts.

The Senate is working on a rare bipartisan banking bill that would scale back parts of the Dodd-Frank regulations for smaller banks. But the bill has exposed divisions among Democrats over protecting former President Obama's legacy.

President Trump has long believed other countries were taking advantage of the U.S. when it comes to trade. NPR's Mary Louise Kelly talks to Tim O'Brien, executive editor of Bloomberg View and author of Trump Nation, about the roots of Trump's views on trade.

Mindy Thomas, co-host of NPR's Wow In The World podcast talks with NPR's Ari Shapiro about a recent episode that explored spacesuits and how they've changed with time.

Former U.S. Ambassador Christopher Hill speaks with NPR's Mary Louise Kelly about the invitation extended from North Korean leader Kim Jong Un to President Trump for a meeting to discuss denuclearization. Hill negotiated with North Korea over its nuclear program.