Science

Breaking up the C.D.C., moving funds from the N.I.H. — conservatives have floated changes should Mr. Trump regain office.

By Apoorva Mandavilli

A large trial showed that semaglutide, sold as Ozempic for diabetes and as Wegovy for obesity, was better than any current medications in alleviating symptoms.

By Gina Kolata

Donald Trump and other Republicans have said repeatedly that she does. Her history on the issue is complicated.

By Emily Baumgaertner and Margot Sanger-Katz

The results of a new clinical trial have overturned the “wait and see” approach that cardiologists have long favored for symptom-free patients.

By Benjamin Mueller

The Pentagon needs what the company offers to compete with China even as it frets over its potential for dominance and the billionaire’s global interests.

By Eric Lipton

With a forthcoming nonfiction book and an online army of Nerdfighters, the young-adult author aims to eliminate an entirely curable global scourge.

By Maddie Bender

For a politician who has been criticized for shifting positions on some issues, this is an area where she has shown unwavering conviction.

By Heather Knight and Pam Belluck

They play an essential role in supporting life on Earth, but many species are in decline, researchers found.

By Catrin Einhorn

Kamala Harris calls global warming an “existential threat.” Donald Trump dismisses it as a “scam.”

By Lisa Friedman

A utility sends phone alerts when wind power is cheap. A builder sells “zero bill” houses. They’re among several experiments to redefine how people value electricity.

By Somini Sengupta and Andrew Testa

The company said it would put Quarter Pounders back on the menu, without the raw onions that were considered the likely source of the bacteria.

By Teddy Rosenbluth

Forecasters will soon be able to use the instrument, a coronagraph, to better monitor the effects of solar storms.

By Katrina Miller

Kinnon MacKinnon leads the world’s largest study on people who stop or reverse their gender transitions, a group embroiled in intense political fights.

By Azeen Ghorayshi

He shared the 1972 physics prize for showing how some materials could convey electricity without resistance. He also did pioneering research in neuroscience.

By Dylan Loeb McClain

Three NASA astronauts and a fourth from the Russian space agency returned to Earth from the International Space Station on Friday morning in a SpaceX capsule.

By Kenneth Chang

Health officials say that recalls of onions — the suspected source of the contamination — would help lessen the risk to consumers. Other major fast-food chains have also stopped offering onions.

By Teddy Rosenbluth

The body’s cooling defenses fail at lower “wet bulb” temperatures than scientists had estimated.

By Clayton Dalton

Archaeologists in Norway have confirmed that an ancient set of human remains known as the Well Man were intended to make the locals unwell.

By Franz Lidz

Climate change, civil conflict and growing resistance to insecticides and treatments are all contributing to an alarming spread of cases.

By Maya Misikir and Stephanie Nolen

His provocative research made him a popular figure on campus. But his exploration of how good people can turn evil raised ethical questions.

By Michael S. Rosenwald

In recent decades, fast-growing blazes were responsible for an outsize share of fire-related devastation, scientists found using satellite data.

By Raymond Zhong

Two people sharing a home caught the virus without known exposure to animals. More than 30 human cases have been reported in the United States.

By Apoorva Mandavilli and Emily Anthes

She lived to 28, roaming the Yellowstone area with her many offspring while becoming a favorite among both residents and visitors.

By Christine Peterson

A deadly outbreak spurred removal of onions by a major food supplier in the Mountain West. Taco Bell, KFC, Burger King and Pizza Hut have stopped serving onions at various locations.

By Teddy Rosenbluth and Christina Jewett

Astronomers offered a new hypothesis for what created pairs of objects nicknamed JuMBOs, while other scientists argue they may not really exist.

By Jonathan O’Callaghan

An annual assessment by the world body tracks the gulf between what countries have vowed to do and what they’ve actually achieved.

By Brad Plumer

A documentary filmmaker and a mathematician discuss our fear of numbers and its civic costs.

By Siobhan Roberts

The group of scientists and economists said they feared a Trump presidency would impede progress in science and technology and in fighting climate change.

By Katrina Miller

The new rules consider any detectable level of lead dust in a building a “lead hazard,” requiring property owners to pay for cleanup.

By Hiroko Tabuchi

The discovery suggests that trade routes along the Silk Road were far more complex than previously understood.

By Alexander Nazaryan

The leader of the long-running study said that the drugs did not improve mental health in children with gender distress and that the finding might be weaponized by opponents of the care.

By Azeen Ghorayshi

Genetic tests showed that certain patients were predisposed to brain injuries if they took the drugs. That information remained secret.

By Walt Bogdanich and Carson Kessler

Nearly 50 people have become ill and one person has died, amid infections that may have been caused by slivered onions, the C.D.C. reported.

By Teddy Rosenbluth

Patient advocates hope Dr. Michelle Tarver will lead the agency to focus more on safety and less on rapid approvals.

By Christina Jewett

In a first, the guidelines link poor pregnancy outcomes to stroke and call on doctors to exercise greater vigilance.

By Roni Caryn Rabin

Climate science has been stymied as Russia continues its war in Ukraine. The stalled work threatens to leave the West without a clear picture of how fast the Earth is heating up.

By Jacob Judah

At the Bruce Museum, an exhibition of duck stamp art tells a 90-year-old story about how paintings can contribute to land preservation.

By James Barron

Celebrating its 150th anniversary, the San Diego Natural History Museum has opened more of its vast paleontology exhibit to visitors.

By Michael Janofsky and Alan Nakkash

The Ames Test offered a fast and inexpensive way to identify carcinogens, leading to the banning of chemicals linked to cancer and birth defects.

By Teddy Rosenbluth

His two-decade quest to find elusive brain hormones became a race against Roger Guillemin, a onetime colleague and an eventual fellow prizewinner.

By Denise Gellene

After 44 days, Kendric Cromer, 12, left the hospital. While his family feels fortunate that he was the first to receive a treatment, their difficult experiences hint at what others will be up against.

By Gina Kolata and Kenny Holston

The Supreme Court ruled in June that the original plaintiffs, anti-abortion doctors and groups, did not have standing to sue. Now three states are trying to continue the legal fight.

By Pam Belluck

Delegates from around the world are meeting in Colombia in what is expected to be the biggest U.N. biodiversity conference in history.

By Catrin Einhorn

We’ve got tips to make the holiday more sustainable, and maybe more fun, too.

By Austyn Gaffney

The crisis of homelessness is pushing American psychiatry to places it has not gone before — like sidewalk injections of antipsychotics.

By Ellen Barry and Rachel Bujalski

Mr. Musk, who holds billions in federal contracts, wants to be in charge of the regulators that oversee him if Donald Trump wins.

By Eric Lipton, David A. Fahrenthold, Aaron Krolik and Kirsten Grind

One of about 150 people known to have a rare condition that causes rapid aging, he sought to raise awareness and participated in the search for a cure.

By Trip Gabriel

The biggest pharmacy benefit managers are profiting by systematically underpaying independent drugstores, creating “pharmacy deserts” across the country.

By Reed Abelson and Rebecca Robbins

By learning the secrets of 2,000-year-old cement, researchers are trying to devise greener, more durable modern options.

By Amos Zeeberg

Several federal agencies are investigating whether the large chain of psychiatric hospitals held patients without medical justification.

By Jessica Silver-Greenberg and Katie Thomas

The Supreme Court’s decision to not temporarily block an E.P.A. rule this week signals ‘rising influence’ of Justice Barrett, one analyst said.

By Karen Zraick

This event is linked to Halley’s comet, and occurs as another comet, Tsuchinshan-ATLAS, remains visible. But a nearly full moon could interfere with some views.

By Katrina Miller

Carbon emissions from forest fires increased more than 60 percent globally over the past two decades, according to a new study.

By Austyn Gaffney

A staple in laboratories worldwide, C. elegans is “an experimental dream,” said one scientist.

By Teddy Rosenbluth

With a new kind of microscope, researchers got a different view of how marine snow falls to the seafloor.

By Veronique Greenwood

Archaeologists have unearthed a richly decorated throne room and a “Hall of the Braided Serpents” from the Moche culture, with clues that a woman may have ruled there more than 1,300 years ago.

By Alan Yuhas

Dr. Sam Yoon and a collaborator duplicated images across their research studies over many years. The collaborator has left Columbia.

By Benjamin Mueller

Food production is concentrated in too few countries, many of which face water shortages, the researchers said.

By Somini Sengupta

In an elaborate experiment, scientists discovered that the insects chose to hibernate in soil full of pesticides and other poisons.

By Darren Incorvaia

Researchers studying bottlenose dolphins found polyester and other plastics in every animal they tested.

By Hiroko Tabuchi

While observational flights have improved forecasts for many storms in the Americas, such flights have been far fewer for storms that have hit Asia.

By John Yoon

A beloved sugar maple slowly succumbed to disease. Today, it lives on in a new form.

By Daryln Brewer Hoffstot and Kristian Thacker

Prada and Axiom Space unveiled their NASA spacesuits, in the most far-out collaboration yet.

By Vanessa Friedman

A surge in power use worldwide could make it harder for nations to slash emissions and keep global warming in check.

By Brad Plumer

Astronomers have yet to confirm the existence of exomoons, but a molecular signal around a far away star offers some of the best evidence yet.

By Robin George Andrews

On the west coast of Florida, a town built to weather hurricanes hosted more than 2,000 people during Hurricane Milton. Could communities like this help shape Florida’s future?

By Austyn Gaffney

In the 1990s, China began sending pandas to foreign zoos to be bred, in the hope that future generations could be released into the wild. It hasn’t gone as planned.

By Mara Hvistendahl and Joy Dong

Supplies of a highly nutritious treatment are running out, according to UNICEF.

By Apoorva Mandavilli

Europa Clipper will study whether Europa, Jupiter’s fourth-largest moon, possesses ingredients and conditions favorable for life.

By NASA

A recent excavation has unearthed 12 human skeletons and a chamber of grave offerings near Petra’s Treasury building, a UNESCO World Heritage site.

By Ali Watkins

The spacecraft lifted off Monday on a SpaceX Falcon Heavy rocket, embarking on a nearly six-year journey to Jupiter.

By Kenneth Chang

Scientists fighting the spread of infectious diseases on the continent have been targeted online by pro-Russian activists, part of an effort to spread fear and mistrust of the West.

By Elian Peltier

SpaceX launched and returned a large rocket booster to its Texas site, catching it with mechanical arms in its first-ever “chopsticks” landing.

By McKinnon de Kuyper

The company completed a successful test flight of the most powerful rocket ever built. Some residents near the Texas site experienced shaking as the landing vehicle was caught by mechanical arms.

By Kenneth Chang and Eric Lipton

Apple is preparing to turn its AirPods Pro 2 into easy-to-use aids for people with mild to moderate hearing loss.

By Paula Span

An outburst from elevated solar activity created conditions on Thursday that kept people’s eyes glued to evening views all over the Northern Hemisphere.

By The New York Times

Greenhouse gas emissions added rain, intensified winds and doubled the storm’s potential property damage, scientists estimated.

By Raymond Zhong

The Tsavo man-eaters terrorized railroad workers in British East Africa in the 19th century, but their tastes went well beyond human flesh.

By Jack Tamisiea

Some birds migrate thousands of miles every autumn. How exactly do they manage it? Scientists built a flight chamber to find out.

By Emily Anthes and Ian Willms

The aurora borealis, which transformed the sky with startling streaks of pink and purple, arose from a magnetic storm.

By Christopher Maag and Tim Balk

She was the rare woman in her field, and a tenured professor. But when a sexist colleague was promoted, she quit, forcing a reckoning in her profession.

By Penelope Green

A sequence of images captured by NASA’s Hubble Space Telescope showed how much the giant storm changed shape as it traveled within the planet’s atmosphere.

By Robin George Andrews

Milton threatened a Daytona Beach site that produces one-fourth of the nation’s IV medical solutions, which were already in short supply because of storm damage in North Carolina.

By Christina Jewett

An explosion of particles arrived at Earth on Thursday, and could lead to visible northern lights in much of the country while also raising power grid concerns.

By Kenneth Chang

The results from an important ongoing assessment look grim. But the survey is often misunderstood.

By Catrin Einhorn

Two of the company’s A.I. researchers shared the Nobel Prize in Chemistry, just hours after the Justice Department started spelling out plans that could lead to its break up.

By Cade Metz, Steve Lohr and David McCabe

The F.D.A. has authorized shipments from overseas plants to ease shortages of IV bags caused by Hurricane Helene as hospitals begin rationing fluids to protect the sickest patients.

By Christina Jewett

Concerned about anxiety and depression among students, some schools are monitoring what children type into their devices to detect suicidal thinking or self-harm.

By Ellen Barry

The Nobel, awarded to David Baker of the University of Washington and Demis Hassabis and John M. Jumper of Google DeepMind, is the second this week to involve artificial intelligence.

By Claire Moses, Cade Metz and Teddy Rosenbluth

E.V. batteries that are submerged in saltwater can catch fire after the floods subside, but experts say it’s a rarity.

By Austyn Gaffney and Brad Plumer