A decade-old treatment plant in San Diego County, Calif., could leave more water in the Colorado River for states facing severe shortages.

The space agency announced that the MAVEN spacecraft, which has circled Mars for more than a decade, is being decommissioned.

Days after the U.S. said it would kill a network of ocean monitors, European officials pledged to invest more in their version, calling it a “necessity.”

Greenpeace International is arguing under Dutch law that an American pipeline company, Energy Transfer, sought to silence it with a costly lawsuit in North Dakota.

The Trump administration is dismantling a $368 million deep-ocean observation system that monitors marine ecosystems and the effects of climate change.

The lawsuit argues that it is illegal to pay the French energy giant TotalEnergies $795 million to cancel a planned wind farm off New York.

A week after OpenAI made headlines with an A.I.-generated proof, a new “declaration” by 16 experts raises concerns that the technology threatens math as a discipline.

The claim that their loved ones’ deaths and disappearances are linked is almost certainly false — but the loss remains real.

The Bundibugyo virus, a little known type, previously had caused just two small outbreaks. Now it’s at the center of a rapidly widening epidemic in Africa.

Once widespread in Japan, the colorful birds went from being fairly commonplace in the country to being on the verge of extinction.

The $368 million network of instruments collecting data in both the Atlantic and Pacific has been critical to climate and ocean research.

Fewer than 100 Rice’s whales remain on Earth. Researchers say sonic blasts from oil exploration are a top threat to the species. See and hear why.

Thousands of mysterious containers lie scattered across northern Laos. These “death jars” may have provided a form of communal interment, archaeologists reported.

Severe, hard-to-control blazes in densely populated areas like Los Angeles drove the year’s record losses.

Clinical trials in China are getting attention at an international oncology gathering in Chicago. China’s surging biotechnology industry is fueling alarm that U.S. dominance in the field is waning.

Despite widespread support in polls, the number of people who actually go through with the practice remains very small.

The second full moon of May will look smaller and dimmer than usual.

Jeff Bezos was gaining ground on Elon Musk’s SpaceX and Starlink. Thursday’s rocket explosion on a launchpad creates a major setback.

A PAC representing wind and solar energy interests spent $1.1 million to boost the Republican primary opponent of Chip Roy, an opponent of renewables. Now they are trying to save a Republican ally in Iowa.

A huge noise rattled part of the state on Thursday. Multiple theories have been put forward, but the mystery remains.