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Can Mountain Lions Survive as Humans Close In?California Is Trying to Find a Way.
A giant freeway crossing for wildlife is due to open outside Los Angeles this year. Here’s the story of one young cat hemmed in near the city.
War Came to Ukraine and Its Dogs Are Not the Same
Researchers discovered surprising changes to former pets along the front line of combat with Russia.
Hims & Hers Withdraws Knockoff Weight-Loss Pill After Regulatory Scrutiny
Federal officials had warned that the new product from the online provider of weight loss drugs might be illegal.
6 Fishermen Reel In a 244-Pound Atlantic Halibut, Setting a Local Record
The fish, hooked as part of a study on the halibut population around the Ha! Ha! Bay in the Canadian province of Quebec, measured more than 6.5 feet long, researchers said.
Michael Pollan Says Humanity Is About to Undergo a Revolutionary Change
The best-selling author grapples with big questions about A.I., consciousness and the distractions polluting our minds.
These Mathematicians Are Trying to Educate A.I.
Large language models struggle to solve research-level math questions. It takes a human to measure just how poorly they perform.
TrumpRx: What to Know About Insurance Benefits, Pricing and Savings
People may be able to pay less for prescriptions with their insurance rather than via the new government website. The Trump drugstore is meant to help people buy medications using their own money.
Studying Antarctica’s Ice From the Side of a Helicopter
The fastest way into the gaps between gigantic blocks of a broken-up glacier is by lowering instruments from above, through the door of a helicopter.
Climate ‘Superfund’ Bills Spread Nationwide, Despite Legal Battles
The laws aim to force oil companies to help pay for damage from global warming. Industry is gearing up for state-by-state battles.
Federal Vaccine Advisers Take Aim at Covid Shots
One panelist accused the F.D.A. of withholding data on potential harms. The advisers also are reviewing research on vaccines given to pregnant women.
Rebuilding the Lighthouse of Alexandria, Block by Virtual Block
An ancient skyscraper considered the seventh wonder of the world crumbled to ruin centuries ago. Now an ambitious archaeological project aims to reassemble it in 3-D.
TrumpRx, the President’s Online Drugstore, Opens for Business
TrumpRx is aimed at helping patients use their own money to buy medicines. But researchers who study drug pricing warned that many patients could pay too much if they use the site.
Rare Deep-Sea Giant Phantom Jellyfish Sighting Is Recorded on Video
During a dive off Argentina, scientists documented a rare jellyfish discovered a little over a century ago and seldom seen since, as well as the fish that keep it company.
At a Bonobo’s ‘Tea Party,’ Scientists Find Hints of Imagination
In a playtime experiment, researchers found that our closest living relatives have the capacity for make-believe, too.
Federal Judge Blocks Texas Law Targeting Critics of Fossil Fuels
The court ruled that it was unconstitutional to bar state agencies from investing with firms that the state had accused of boycotting the oil industry.
Nuclear Arms Control Era Comes to End Amid Global Rush for New Weapons
Beijing, Moscow and shaken American allies are seeking new warheads as President Trump ends more than a half century of nuclear arms control with Russia.
F.D.A. Relaxes Rules on ‘Naturally Derived’ Dyes
Food makers will now be able to claim that their products have “no artificial colors,” so long as they use dyes that are not petroleum-based.
He Built a Server to Protect Indigenous Health Data
Joseph Yracheta was in charge of a repository that compiled and protected tribal health data. Then its funding was cut.
Dozens of Earthquakes Have Rattled San Ramon, California
San Ramon, Calif., has been rattled by dozens of small earthquakes in recent months. Even in a region used to regular shaking, it’s been a lot.
Senators Accuse Equifax of ‘Price-Gouging’ Medicaid Programs
The company’s data will be essential for many states to comply with new work requirements for the health insurance program that take effect next year.
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