Scientists find the signatures of war on the edge of space.
Climate change is warming our oceans, and that thermal energy is fueling stronger hurricanes.
Mixtures of chemical pollutants may harm people and wildlife, even when each chemical is below its regulatory threshold.
Escaped methane likely warms the climate as much as all natural gas burned in the U.S.
As erosion claims land, local scientists explore using oysters to preserve parts of the Mississippi delta.
Ambitious plan aims to keep waste out of rivers without massive new pipes.