NPR Staff

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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.

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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?

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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.

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