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Government officials argue that encrypted communication poses national security risks. But tech companies say that making it possible to unlock devices would make the tools less secure for everyone.

How many trees are there in the world? Some scientists are working on a new estimate.

As part of the encore airing of NPR's "Journey Home" series on the presidential contenders, we go to the town in Texas where Rand Paul grew up.

From photos of far-flung Pluto to space lettuce, it's been an exciting year for developments in space. NPR Science Correspondent Geoff Brumfiel shares three highlights with host Linda Wertheimer.

Joy star Jennifer Lawrence discusses the career-changing "yes-or-no" decision she faced. Justin Chang reviews The Hateful Eight. Anomalisa co-directors Charlie Kaufman and Duke Johnson talk puppetry.

Germany is struggling with 1 million migrants who applied for asylum this year. Officials say the key to integration is education, and many schools have made accommodating migrants a priority.

A decade after playwright August Wilson's death, his childhood home in Pittsburgh is in bad shape. As Erika Beras of WESA reports, community members have mixed feelings on what to do with what's left.

A new study in the journal JAMA Pediatrics says electronic toys for infants that produce lights and words were associated with decreased quantity and quality of language when compared to wooden toys.

Mexican chef Pati Jinich shows NPR's Carrie Kahn how to handle those Christmas dinner turkey leftovers. She shows us how to make a mouthwatering pibil sauce for next-day sandwiches and enchiladas.

2015 was a pivotal year for black Americans and civic activism. Gene Demby of NPR's Code Switch talks through some of the year's major stories with NPR's Carrie Kahn.