The virologist was stopped at the Detroit airport after working in Congo during an mpox epidemic. His lawyer said the material was for research.

Artificial intelligence is mastering the kinds of projects that have long helped to build the careers of young mathematicians. What does that mean for their future?

For millions of years, male great bowerbirds have wooed their mates with flowers and seeds. But in today’s urban world, such humble fare may not cut it.

An auction to drill in the Arctic National Wildlife Refuge ended with just 10 percent of the available land claimed for oil development.

The forthcoming order echoes President Trump’s decision to repeal executive orders that have protected other public lands from vehicles for decades.

Russian astronauts prepared to make repairs on Friday morning, but after an hour and a half, officials decided no urgent action was needed.

Here’s why farmers and scientists are concerned over the New World screwworm’s unwelcome return to the United States.

Researchers relied on a newer gene-editing technique that may make it possible to engineer embryos, a prospect that has long alarmed bioethicists.

The president announced a total of $700 million in federal money to reinvigorate the domestic coal industry, which has been in decline for decades.

He mapped the herpes simplex virus genome, revealing how it invades cells. His work also helped lay the groundwork for potential vaccines and gene therapies.

Gwynne Shotwell, the president and chief operating officer, is the adult-in-the-room foil to Mr. Musk as SpaceX prepares for a blockbuster initial public offering.

Light pollution prompts plants to shed pollen longer and stronger, according to new research.

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.