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NPR's Robert Siegel interviews Dan Kaufman of the Defense Advanced Research Projects Agency about a sophisticated Internet search engine developed to help police track down human traffickers.

Doctors are running out of effective antibiotics, as bacteria evolve ways to evade one drug after another. Now DARPA has called for alternatives to conventional antibiotics. Nanotechnologist Chad Mirkin discusses one such weapon--tiny globs of DNA and RNA that can switch off the bugs' antibiotic resistance. Nanotechnologist Chad Mirkin discusses next-generation antibiotics that target a bacterium's DNA.

The president showed little interest in policy details. If he continues to focus superficially on getting a win instead of learning, Republicans warn that his priorities will continue to be derailed.

In January, one man died and four others sustained brain injuries in the early clinical test of an experimental pain drug. Independent scientists reviewed the study to learn what went wrong.

Young Muslims find a middle ground for fostering romantic relationships between what is permissible and what is forbidden.

This week, a federal panel is hearing arguments for and against a voter ID law in Texas. U.S. Attorney General Eric Holder says the Texas voter ID law is like a modern poll tax. Guest host Maria Hinojosa talks more about the issue with Rep. Jose Aliseda, who testified at the hearing. He's a Republican State Representative for Texas who was born in Mexico.

At the United Nations, President Obama said the attacks that killed the U.S. ambassador and three other Americans in Libya "were attacks on America." Also in New York, Mitt Romney said U.S. foreign aid plays an important role, but that U.S. policies must promote independence, not reliance on aid.

Win or lose on Election Day, Republican Mitt Romney has already made history as the first Mormon to win a major party presidential nomination. But has his race for the White House changed Americans' perceptions and stereotypes of The Church of Jesus Christ of Latter-day Saints?

The discovery suggests an earlier start to the Middle Stone Age in Africa than previously documented. It also offers clues to early social networks and symbolic art by human ancestors.

So long, Dick Gregory, Fats Domino, Simeon Booker and many others you might not have heard of. Here's our Code Switch look back at some of the significant passings in 2017.