Volunteers in Mason City are taking part in a week-long project to remove trash from the Winnebago and Shell Rock Rivers.

A new map shows hidden Martian rivers stretching thousands of miles, offering fresh evidence of a warm, wet ancient Mars.

Might sinuous ridges carved out across the ancient highlands of Mars hold the secret to a vanished age of rivers and rain on the Red Planet? Over 15,000 kilometers of such fluvial sinuous ridges, or ...

The Mississippi River flows from the State of Minnesota to the Gulf of Mexico. Major tributaries include the Missouri and ...

Using Fredericksburg as a proxy for the region, the average July rainfall over the last about 40 years is 2.2 inches. But ...

While Texas may feel far from the Northeast, the lessons from the Texas Hill Country disaster matter here, too, particularly ...

Lakes Travis and Buchanan have risen significantly as a result of recent heavy rains in the Texas Hill Country, which have caused widespread devastation.

The Charles River, despite past improvements, has stalled in its progress toward becoming consistently swimmable. Polluted stormwater runoff, carrying contaminants like oil and pet waste, is ...

A recent study suggests that ocean changes are the primary nutrient source for sargassum blooms since 2011, challenging previous hypotheses.

The Brazilian environmental agency, IBAMA, approved a license to blast a natural rock barrier on the Tocantins River in Pará state to enable boats to pass during the dry season, as part of wider ...

Melting snow from California's Sierra Nevada is filling reservoirs. But dry conditions have shrunk the flow of the Colorado River, straining a vital supply for Southern California.

The Columbia River is critical for fish, energy, commerce and identity. But it faces an uncertain future. How much more can it take?