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A team of Indian physicists has made a mathematical model that purports to explain why ants don't have traffic jams. NPR's Joe Palca explains as part of his series, Joe's Big Idea.

As Greece's Syriza party takes charge, NPR's Robert Siegel interviews Jacob Funk Kirkegaard, senior fellow at the Peterson Institute For International Economics, about what this means for Greece and the Eurozone.

For a second year in a row, a mass migration of snowy owls from Canada is occurring, and that's highly unusual.

Peter Judge of the Massachusetts Emergency Management Agency explains what the state is doing to prepare.

At its closest point, asteroid 2004 BL86 came within about 750,000 miles from Earth — or almost three times farther away than the moon.

The administration wants to tie more of Medicare's spending on health care to quality and to encourage doctors and hospitals to be more frugal in their spending.

Jeffrey Sterling was fired from the CIA in 2002. His case has drawn wide attention in part because he was accused of giving secret information to James Risen of The New York Times.

Oil industry representatives are criticizing the decision, but analysts say the shale revolution will buy the industry time to develop safe technology in the threatened environment.

Critic Kenneth Turan says Going Clear and The Hunting Ground are among the films that "blew people away" at this year's Sundance Film Festival.

President Obama has proposed changing the tax treatment of college savings accounts known as 529 plans. Some are calling this a tax increase on the middle class.