Research uncovers more of Mars’s past, when flowing water may have been transient before eventually disappearing.
Were Mexico’s September Quakes Chance or a Chain Reaction?
Last year, two major earthquakes—one 12 days after the first—shook Mexico. New analysis blames this very unlikely event on chance. But one of the pair may have triggered a third large nearby temblor.
Southern Europe’s Groundwater Use Will Become Unsustainable
Even places without groundwater problems now will face water shortages by the 2040s if climate change continues on its current trajectory.
Assessing U.S. Fire Risks Using Soil Moisture Satellite Data
NASA satellite data and models provide information for mapping fire risks nationwide, giving agencies tools for fire response, say scientists at the AGU Fall Meeting.