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NASA held a press conference to discuss the stability of the West Antarctic Ice Sheet and its potential contribution to future sea level rise. The researchers announced that the ice sheet's collapse is both underway and unstoppable.

Author Christiane Dorion distills complex scientific concepts into bite-sized explanations. "You can teach anything to children if you pitch it at the right level and use the right words," she says.

It's hard not to worry about heart problems when running hard in hot weather. But heatstroke is a far bigger health risk, researchers say. Marathon organizers are trying to make races safer.

The report concludes that the production of Canada's tar-sand crude, which causes more greenhouse gases than other forms, won't be affected if the pipeline moves forward.

A team of scientists says it has reawakened an ancient pathogen. It's not dangerous to humans, but they warn that climate change could free potentially deadly organisms locked in permafrost.

At the Vatican this week, the pope's G9 — a committee of nine cardinals — is working on how to overhaul Vatican governance.

Programmer and activist Aaron Swartz was a "complex person," says filmmaker Brian Knappenberger. He tells Swartz's story, including his legal battle and suicide, in a new documentary.

In this vicious election climate, TV and social media are filled with — surprise, surprise — negative ads! Bowdoin College political science professor Michael Franz talks with NPR's Scott Simon.

NPR's Audie Cornish talks with Keith Seitter, executive director of the American Meteorological Society, about the absence of federal scientists slows down life-saving research.

Apple's stock split is the cause of the shake-up at the Dow Jones Industrial Average. But the symbolic shift also represents how Exxon, once a corporate titan, has diminished in stature.