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For decades, we have known of only 14 convex pentagons that can do something called "tiling the plane." Now there is a 15th shape, but mathematicians are still far from knowing exactly how many exist.

It's not every day that basic research into bacteria leads to an application as useful as keeping ice cream frozen longer while holding ice crystals at bay.

Twitter is going through a lot of changes, including switching CEOs. But, analysts say, stalled user growth and discouraging financial results call for more change than just new leadership.

President Obama defends the health care reform law as the Supreme Court prepares to issue a ruling in a case that could dismantle it. The law still remains controversial politically.

To the three Rs, the schools in the nation's capital have added a fourth: Riding. Bicycles, that is.

In the 1960s, Chairman Mao Zedong ordered scientists to find a malaria antidote to help ailing soldiers in North Vietnam. Today's Nobel Prize for medicine went to one of those researchers.

It's been nearly 40 years since the schools in Columbus were desegregated. It took a court order and some pioneering teachers to accomplish the task. Now…

More than 150 people showed up for a public hearing at city hall about Columbus Mayor Michael Coleman's streetcar proposal. Some people waited more than…

Economists talk about moral hazards. When you protect people against risk you prevent bad things from happening. But something curious happens: Some start to take more risks because they feel safer.

Lee's new film, Chiraq, draws on an ancient idea to deal with the present-day crisis of gun violence in Chicago. Natalie Moore of member station WBEZ explains how.