Though river monitoring shows bacteria levels have declined, scientists and environmentalists said a full recovery isn’t yet assured.

Collection services offer convenience, but most garments are shredded into low-grade stuffing or sent abroad to an uncertain fate.

House leaders abruptly canceled a vote on the measure when support started to look shaky.

Testifying on Capitol Hill, Robert F. Kennedy Jr. continued to back away from his criticism of the measles shot. But he spoke on behalf of his department, not himself.

Promoters of free birthing reject any type of medical intervention during pregnancy or delivery. The movement has been trending on social media, but critics warn it poses serious risks.

The agency has approved far fewer new grants than it did in years past. A renewed effort to screen for disfavored terms and a loss of personnel are contributing.

Suicides among young adults dropped most sharply in states that actively embraced the 988 crisis line, new research has found.

In separate lawsuits, environmental regulators said D.C. Water failed to prevent and contain a massive spill of raw sewage upstream of Washington.

As SpaceX prepares to go public, Mr. Musk has proposed moonshots that differ from the company’s original aim of reaching Mars.

In the Big Bend region, a portal to the early universe is enabled by the largest dark-sky reserve on Earth.

The frequency of fireballs in our planet’s skies seemed to grow in recent months. NASA and other meteor experts can’t agree on what explains it.

The Interior Department had imposed restrictions on wind and solar projects across the country, prompting developers to sue.

Active since last week, the Lyrids meteor shower is expected to reach peak viewing tonight.

His immensely popular, and controversial, 1967 book, “The Naked Ape,” argued that ancient genes, shared with apes, shape our lives.

With shortages of medical professionals and an aging population, thousands of community health care workers prevent older adults from falling through the cracks.

Scientists are debating the classification of threatened mollusks that an Indigenous community relies on for their way of life.

The space agency is counting on Jeff Bezos’ company to deliver equipment essential to the next moon landing, only two years away.

The Earth slips behind the moon in an iPhone video taken by Reid Wiseman during NASA’s Artemis II mission, a sequel to the iconic Earthrise photo taken by Apollo 8.

Researchers at the University of Pittsburgh gave transplant recipients certain immune cells from their organ donors. It didn’t always work.

The android won a race featuring robots and humans on Sunday in Beijing, achieving a technological milestone while finishing faster than any person in history.