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Richard Hamilton, Who Helped Solve a Mathematical Mystery, Dies at 81
He came up with an innovative equation called the Ricci flow that helped mathematicians explore fundamental questions that were once out of reach.
Mammoth: It’s What Was for Dinner
A study of a 12,800-year-old skull of a toddler offers a glimpse at how early Americans found food, and how their hunts may have led to a mass extinction.
Researchers Release Hawaiian Crows Back Into the Wild
Researchers are trying a new strategy to reintroduce Hawaiian crows, which have been extinct in the wild for two decades.
E.P.A. Again Seeks Limits on a Harmful Pesticide
After a court overturned a ban, the agency has proposed restricting chlorpyrifos to 11 food crops, illustrating the limits of federal regulation.
Trump Picks Jared Isaacman to Lead NASA
Mr. Isaacman’s company Shift4 Payments made him a billionaire, and he has financed two trips to orbit on SpaceX vehicles, including a daring spacewalk in September.
Google Introduces A.I. Agent That Aces 15-Day Weather Forecasts
GenCast, from the company’s DeepMind division, outperformed the world’s best predictions of deadly storms as well as everyday weather.
McDonald’s E Coli Outbreak Declared Over
Federal health agencies closed their investigations into the bacterial outbreak that sickened 104 people and was linked to onions on the fast-food chain’s signature Quarter Pounders.
So You’ve Had a Hysterectomy. Do You Know What Was Removed?
Patients often are in the dark about which organs remain and which were removed — particularly the ovaries, which profoundly influence lifelong health.
Five Questions to Ask Your Doctor When Weighing a Hysterectomy
Many patients are confused about what their surgeons are planning. Here’s how to get the details.
Long a ‘Crown Jewel’ of Government, N.I.H. Is Now a Target
The agency long benefited from broad bipartisan support. But Republican criticism has intensified, and new choices for top health posts hope to upend the organization.
Nations Fail to Reach an Agreement on Plastic Pollution
Talks on the world’s first treaty to tackle plastic pollution will continue in coming months, delegates said.
Mexican Cartels Lure Chemistry Students to Make Fentanyl
Criminals turn college campuses into recruitment hubs, recruiting chemistry students in Mexico with big paydays.
What a Marine Heat Wave Reveals About Our Warming Oceans
An extreme heat wave off California’s coast seemed like an anomaly 10 years ago. But as the ocean warms, the catastrophe may be a glimpse of the future.
Giant Redheaded Centipedes Are Venom Mixologists
The arthropods can tailor their toxins depending on whether they are hunting prey or defending themselves from predators, according to a new study.
Saudi Arabia Leads Pushback Against Global Plastic Treaty
Delegates from more than 170 countries are working to salvage a treaty that would tackle the growing problem of plastic pollution.
Air Turbulence From a Storm Can Start Earlier Than You Expect
This is your captain speaking: You may need to buckle those seatbelts a lot sooner than you’re used to.
Dr. Dave Weldon, Trump’s CDC Pick, Wasn’t on Anyone’s Radar
But over the years, the former congressman’s views have often aligned with those of his potential boss, Robert F. Kennedy Jr. — particularly on vaccine safety.
Life After Death: America’s Cemeteries Are Rewilding
More burial sites are forgoing pristine lawns for drought resistant plants and wildflowers that help wildlife. Efforts picked up in the pandemic.
Nursing Home Industry Wants Trump to Rescind Staffing Mandate
A Biden administration rule that imposed minimum rules on nursing levels may not survive, even though many homes lack enough workers to maintain residents’ care.
Killer Whales Hunt Whale Sharks and Feast on Their Livers
Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers.
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