The Space Launch System and Orion capsule were transported to the launchpad before an astronaut mission that could launch as soon as Feb. 6.

Studying tree rings helped scientists pinpoint when Mount Rainier last sent a lahar down its steep slopes, which could help planners anticipate future mudflows.

The members of Crew-11 ? two American, one Russian and one Japanese ? splashed down after one became ill, prompting an early return.

The U.S. Agency for International Development has been a major supporter of global agriculture research. Now many studies are being scuttled or scaled back.

This year?s recipient of the Tyler Prize for Environmental Achievement talks about ?punk science,? microbial economics and thinking like a mycorrhizal fungus.

Scientists prepared a high-quality sequence of the giant mammal?s genome based on a specimen preserved in Siberian permafrost.

Animals that researchers call ?supersucklers? come back to nurse even after they can hunt, mate and fend for themselves.

A cavity in the middle of the rockhead poacher?s skull might be used like a maraca to produce sound, new research suggests.

A fossil of Manipulonyx reshetovi, found in a Mongolian desert, shows how the dinosaur used its specialized claw to snatch eggs.

A professor at the University of California, Santa Cruz, he was a key contributor to a landmark paper that laid out how the universe came to look like it does today.

Two regulatory rollbacks, along with a new A.I. experiment in Medicare, raise some worrisome questions.

Over two decades after negotiations began, the High Seas Treaty is designed to protect biodiversity in international waters by enabling conservation zones.

The review looked at more than three dozen studies and found no evidence that acetaminophen increased the risk of neurodevelopmental disorders in children.

The case could affect thousands of claims that the widely used weedkiller causes cancer.

Construction can continue on an $11.2 billion project off the coast of Virginia, said to be 70 percent complete.

Federal officials working on the new dietary guidelines had considered limiting men to one drink daily. The final advice was only that everyone should drink less.

A federal judge said the Empire Wind project off Long Island would suffer ?irreparable harm? if the Trump administration continued to hold up work.

The Trump administration has signed $11 billion in agreements with African nations, in deals tied to foreign policy goals.

The Justice Department and whistle-blowers accused the major health insurer of overbilling the government for about $1 billion under the private plans.

Four astronauts departed from the I.S.S. about a month earlier than scheduled because a crew member, who was not identified, has an undisclosed medical issue.

Bad weather has postponed attempts to set up camp on the Thwaites Glacier. So researchers got onto the sea ice and met a local.

Last year was Earth?s third hottest globally, but temperature is just one measure of climate change?s influence.

The agency wants to curtail a section of the Clean Water Act that Democratic governors have used to restrict fossil fuel development.

That number could increase significantly as more consumers are faced with higher bills brought on by expiring premium subsidies.

The groups, including the American Academy of Pediatrics, say the C.D.C.?s revised vaccine schedule is not based on scientific evidence and will harm the public.

The clock is ticking. But low clouds have prevented helicopters from moving scientists and gear onto the continent?s fastest-melting glacier.

The increase in planet-warming emissions came after two years of decline as demand for electricity has been surging.

Psilocybin-assisted therapy is legal in three states, but access has so far been limited and expensive.

He Jiankui spent three years in prison after creating gene-edited babies. Now back at work, he sees a greater opening for researchers who push boundaries.

The Energy Department canceled $7.5 billion in Biden-era energy spending, largely in Democratic-led states, during last year?s government shutdown.

The ruling means that construction can continue on Revolution Wind, a $6.2 billion project off the coast of Rhode Island, at least for now.

A study of more than 5,000 pages of agency documents on mifepristone over 12 years found that agency leaders almost always followed the evidence-based recommendations of scientists.

The president?s embrace of fossil fuels and withdrawal from the global fight against climate change will make it hard to keep warming at safe levels, scientists said.

The idea of cows grazing in a pasture seems idyllic. We asked experts how their emissions stack up compared to factory farms.

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