Not long ago, the Internet was speculating that Comet 67P was on the reddish side, but a new image from the European Space Agency shows the comet goes for gray.
Curiosity rover finds signs of simple organic compounds in a Martian soil sample -- but scientists say the finding won't be conclusive until tests confirm earthly contaminants aren't present.
Scientists find new evidence that contradicts earlier assumptions that the lagoon city was out of trouble.
As Brazil's attorney general files an injunction to block tweets and suspend accounts of Twitter users warning people about speed traps, the question is will Twitter work with the Brazilian government and use its new tweet removal policy?
Researchers estimate worldwide commercial shipping puts out almost half as much particle pollution as cars.
We've got to crack down on emissions and do it within the century, or we'll face widespread problems brought about by climate change, warns American Geophysical Union.
An expert frets about the accelerating retreat of glaciers from mountain peaks. With rates up to 60 meters per year, is it time to redefine the term "glacial"?
A Stanford team gives Cape Mendocino the top pick as a site for an offshore wind turbine power plant. Also: interconnect wind farms for a steady electrical supply.
Marika Holland, scientist at the National Center for Atmospheric Research, presents projections suggesting that Arctic sea ice could be completely melted within 25 years. From the AGU Conference in San Francisco.
At the AGU Fall Meeting in San Francisco, scientists discuss the satellite project GRACE (short for Gravity Recovery and Climate Experience), which estimates how the world's water depths have changed and will change over years to come. Hear from the scientists, and check out some of the satellite images.