NPR Staff

If movies were trying to be more realistic, perhaps the way to summon Batman shouldn't have been the Bat-Signal — it should have been the bat squeak.

New research from the Bat Lab for Neuro-Ecology at Tel Aviv University found that bats are "vocalizing" more information than many researchers previously thought. And researchers were able to decipher what the bats were squeaking to each other about — often they were bickering over things like food, sleep and mating.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

ROBERT SIEGEL, HOST:

Professor Kimberly Marten of Barnard College is a scholar of U.S.-Russia relations, and she joins us now. Welcome to the program once again.

KIMBERLY MARTEN: Thank you.

SIEGEL: What effect do you expect these sanctions would have on Russia?

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

ROBERT SIEGEL, HOST:

It was a violent Christmas weekend in Chicago. Sixty-one people were shot, 11 killed. That brings the number of murders in Chicago this year to over 750. It's a 58 percent increase over last year, and it's the most of any American city.

When Donald Trump won the presidential election, he made a pledge to every citizen: that he would be president for all Americans. In the weeks before Trump's inauguration, we're going to hear about some of the communities that make up this nation, from the people who know them best, in our series Finding America.

Historian Free Egunfemi worries that the history of the black community in Richmond, Va., is getting lost.

NPR's national security correspondent Mary Louise Kelly sat down for a 52-minute interview Thursday with CIA Director John Brennan at CIA headquarters in northern Virginia. Kelly asked about Russian interference in the U.S. election, how the CIA views President-elect Donald Trump and the future of Syria. Brennan also shared some of his plans for his post-CIA life. (Hint: He won't be writing a spy thriller).

There was no shortage of sad news in 2016.

And because we're a blog that covers global health and development, we covered a lot of those sobering stories: the toll of diseases like Zika, the bombing of hospitals in conflict zones, the suffering caused by poverty and by discrimination against women.

But we published a lot of hopeful stories as well. We asked our team at Goats and Soda to pick some of the stories from this year that inspired them the most. We hope you're inspired too.

Donald Trump should deal with how to handle his business holdings before he takes office, says former House Speaker Newt Gingrich, an adviser to the president-elect. But Gingrich says it would be "an absurdity" to put Trump's holdings in a blind trust.

There's a grim chapter in American history that involves forced sterilization. And for much of this past century, California had one of the most active sterilization programs in the country.

A state law from 1909 authorized the surgery for people judged to have "mental disease, which may have been inherited." That law remained on the books until 1979.

In 2008, NPR gathered more than a dozen voters in a York, Pa., hotel. They had dinner and got to know one another, and over the course of several meetings that fall they spent hours sharing their views on an often uncomfortable subject: race.

As a child, Francisco Ortega lived in rural Tijuana, Mexico, 100 miles south of where he lives with his family now.

"We were so poor, but I used to say my mother kept the best dirt floors ever," he told his 16-year-old daughter, Kaya during a recent visit to StoryCorps. "They were the cleanest dirt floors in the planet.

Pages