Angela Stimpson donated a kidney to a complete stranger. Why did she do it? Researchers found that the brains of Stimpson and other altruists are sensitive to fear and distress in a stranger's face.
Tonight, NASA's MAVEN spacecraft will arrive at Mars to study the thin Martian atmosphere to give scientists a better idea of why the Martian climate changed so dramatically billions of years ago.
The People's Climate March is timed to draw the notice of world leaders gathering for this week's U.N. Climate Summit in New York.
Michael Toma of Claremont University has looked into the differing cognitive abilities of crossword puzzle experts versus Scrabble aficionados. NPR's Wade Goodwyn discovers the differences.
Astrophysicist Roberto Trotta argues that we don't need jargon. He tells NPR's Wade Goodwyn he's compiled a history of the universe as we know it, using only the 1,000 most-common English words.
The skeleton lay buried in a gravel pit for tens of thousands of years. This week, paleontologists carefully transported the last and largest section to the Perot Museum of Nature and Science.
Ooh, you smell so good ... and we're both members of the Whig party, too! Turns out there's scientific evidence that people who share political beliefs are attracted to each other's body odor.
Hundreds of thousands are expected at a march in New York City ahead of the United Nations climate summit. Organizers want to send a message to world leaders that it's time to take concrete action.
In the new exhibit "Genesis," the noted photographer Sebastiao Salgado shares his vision of "a kind of state of humanity of the planet," from Amazon tribes to frozen Siberia.
They are small. They are weak. They are vulnerable. But these little bees take on a humongous predator in the most ingenious way.
Is Democracy a key to better levels of health in a country? That's long been the belief, but we hear about some research that shows that isn't always the case.
Earlier this week, NASA awarded two contracts for new spaceships to commercial companies. Here's how they compare.
Health leaders now say the Ebola epidemic is growing exponentially. That means, if nothing changes in the next few weeks, we could see at least 60,000 Ebola cases by the end of 2014.
With rising seas, cities like Satellite Beach, Fla., are debating options: defend the shoreline to avoid destruction, or retreat, withdrawing homes and businesses from the water's edge.
Two major doughnut chains have bowed to consumer pressure to better police their palm oil purchases. Environmentalists say its a win for consumers, trees and animals.
A new study bolsters the theory that chimpanzees kill rivals as an adaptation to their natural environment and not as a result of human impact.
If you don't think you like bitter foods, try them again. Jennifer McLagan, the author of Bitter: A Taste Of The World's Most Dangerous Flavor, is on a mission to change hearts and minds.
There's a new wrinkle to the old debate over diet soda: Artificial sweeteners can alter our microbiomes. And for some, this may raise blood sugar levels and set the stage for diabetes.
Genetic evidence from ancient humans and modern people suggests that travelers from northern Eurasia moved south several thousand years ago. They stuck around to have kids with early European farmers.
A team of researchers are using multispectral imaging to uncover hidden text on a 1491 Martellus map, one of the most important maps in history. Lead researcher Chet Van Duzer thinks the discoveries will allow historians and scholars to see just how the map influenced cartography in its time.