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NASA is sending a solar-powered rover prototype designed for ice exploration to Greenland. Could this be preparation for a Europa mission?
Hidden beneath Greenland's ice sheet is a massive canyon that's more than 460 miles long and up to 2,600 feet deep at points.
NASA makes its annual summer survey of the Greenland ice sheet.
Northeastern U.S. and Canadian coastal waters may rise 12 to 20 inches by 2100 in addition to projected sea level rise from other factors, NCAR says.
Shields in space, artificial volcanic eruptions, pumping carbon dioxide underground, ocean fertilization--all these "geoengineering" ideas are being discussed, says Harvard professor.
Blame the feedback loops: In 2007, Arctic ice hit a new low, Greenland ice melted for longer, and the Arctic Sea temperature was 'off the charts.'
The House speaker, fresh off a visit to Greenland and Europe, says she hopes Congress will enact new restrictions on carbon dioxide emissions by year's end.
Shortly after the French aircraft maker finishes high-elevation tests in Bolivia on one version of the energy-efficient jet, it begins cold-weather testing on Baffin Island.