A "mountain-sized" comet known as Siding Spring will pass very close to the Red Planet, where orbiters from the U.S., Europe and India, hope to get close - but not too close — to the action.
The federal government will suspend funding while it reviews the potential risks and benefits of certain experiments with three viruses: SARS, MERS and influenza.
NASA says it plans to replace the digital countdown timer that's featured prominently in broadcasts and images of Kennedy Space Center launches ever since the second moon landing mission 45 years ago.
Previous research found that going on Medicaid increased a poor person's use of costly emergency room visits. Now an analysis suggests that initial spike in ER visits quickly tapers off.
Just a few years ago, authors were predicting production would soon hit a peak and then decline. But since then, supplies have surged. So are the forecasters now slapping themselves in the head?
Apeel Sciences hopes its products, which use natural methods to fend off pests and oxidization, can markedly reduce the amount of produce wasted because of spoilage.
Labels like "organic" and "grass-fed" don't capture the beef industry's true environmental impact, researchers say. Why not have a label that assesses water use, land use and greenhouse gas emissions?
Termites and mung beans are among the ingredients that can bring better nutrition to the 800 million undernourished people in the lower income world.
Farmers will be able to plant types of corn and soybeans that can tolerate doses of two weedkillers. It may be one of the most significant developments the world of weedkilling in more than a decade.
For the first time, scientists are reporting that human embryonic stem cells may be helping treat patients — in one instance, the cells seem to been enabling some blind people to see better.
Cells derived from embryos appear to have improved vision in more than half of the 18 patients who had become legally blind because of two progressive, currently incurable eye diseases.
Most of the noise created by natural gas development is temporary. After drilling and fracking, the workers and equipment are gone. But compressor stations can stay noisy for years — even decades.
Women's voices are often criticized, especially at work. We're called "shrill," told we "lack authority." Here's the story of two women who changed their voices in a quest to be heard.
There are many theories about what exactly the unmanned X-37B is doing as it circles the Earth on long-duration missions.
Starting Wednesday, six "astronauts" will live in a geodesic dome on a remote volcanic outcrop in an eight-month simulation of a Mars mission. Robert Siegel talks to commander Martha Lenio.
Jennifer Doudna used to worry her science wasn't doing anything important. Then some basic research led her team to a discovery that could one day be crucial in healing some genetic diseases.
To test subtle biases, researchers sent state legislators identical emails about voting requirements. Some emails came from a man with a "Latino" name, and others from an "Anglo" name.
When blood flows over an artificial surface, whether it's an implanted pacemaker or tubing for a dialysis machine, there's an increased risk that a dangerous clot will form.
Scotland has some of the best trout fishing in the world. Now the North American signal crayfish is taking over waterways, threatening to wipe out native populations of insects those trout eat.
A new study suggests that people with Alzheimer's can hold on to happy or sad feelings, even if they forget what triggered them. NPR's Ari Shapiro speaks with the study's author, Edmarie Guzman-Velez.