Researchers say they're surprised by how much harmful ozone and ozone-causing chemicals are drifting into the Colorado mountains from urban and rural areas below.
NASA is moving ahead with plans to build a massive rocket designed to explore deep space and culminate in human trips to Mars, the agency announced yesterday.
An unusual species of fish that can walk and breathe air shows that these animals may be more capable of adapting to life on land than previously thought, researchers say.
For at least a century, the "slithering stones" of Death Valley—rocks, some of them boulders weighing more than 600 pounds, that move across the desert floor...
A panda research center in China called off what would have been the first-ever live broadcast of a panda birth after determining that panda Ai Hin wasn't...
The federal government is protecting 20 types of colorful coral by putting them on the list of threatened species, partly because of climate change.
Houston, we have a question: What are these weird spiky shapes we're seeing as we fly over Siberia? That's what astronauts were asking this June, when the sight of strange,...