Scientists find new evidence that contradicts earlier assumptions that the lagoon city was out of trouble.
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.
Researchers estimate worldwide commercial shipping puts out almost half as much particle pollution as cars.
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?
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.
OK, so you don't believe there's a link between global warming and the uptick in heat waves? Now there's new evidence you can ignore at your own risk.
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.
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"?