Boris and Svetlaya were raised together as orphaned cubs, and then reintroduced to the wild separately. But Boris went on a trek that surprised the researchers who were monitoring him.
Google presentó una máquina experimental capaz de realizar tareas que una supercomputadora tradicional no podría dominar en 10 cuatrillones de años.
Four Palestinian researchers describe how conflict in Gaza and the West Bank has hindered their careers in science and medicine.
Google unveiled an experimental machine capable of tasks that a traditional supercomputer could not master in 10 septillion years. (That’s older than the universe.)
A series of surprising milestones, events and trends that were unprecedented until now.
Lunar exploration in the 21st century offers a unique opportunity to unite us.
Wisdom, a Laysan albatross, has outlived at least three mates and the researcher who outfitted her with a tracking band in 1956.
A new study suggests that the insects rely on the sounds made by distressed vegetation to guide important reproductive choices.
Wisdom, a 74-year-old Laysan albatross, laid an egg at Midway Atoll National Wildlife Refuge at the northwestern edge of the Hawaiian Archipelago.
It is unclear where the program to go back to the lunar surface will head after President-elect Donald J. Trump returns to the White House in January.
On America’s large dairy farms, milking is a vast operation, and the potential for disease transmission is worrying, health experts say.
No shockwave. No mushroom cloud. But a space nuke would change life on Earth forever.
He came up with an innovative equation called the Ricci flow that helped mathematicians explore fundamental questions that were once out of reach.
On the test, American fourth and eighth graders posted results similar to scores from 1995. It was a sign of notable stagnation, even as other countries saw improvements.
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.
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.
GenCast, from the company’s DeepMind division, outperformed the world’s best predictions of deadly storms as well as everyday weather.
Readers discuss what one calls a “boom-or-bust precipitation cycle.” Also: Pete Hegseth’s mother’s accusation; what opera needs; Elon Musk and Mars.
The arthropods can tailor their toxins depending on whether they are hunting prey or defending themselves from predators, according to a new study.
Los grupos delictivos convierten los campus universitarios mexicanos en centros de reclutamiento, atrayendo a estudiantes de química con grandes ganancias.
Criminals turn college campuses into recruitment hubs, recruiting chemistry students in Mexico with big paydays.
This is your captain speaking: You may need to buckle those seatbelts a lot sooner than you’re used to.
Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers.
A discovery in northern Kenya hints that two extinct species that were our ancient relatives shared the same habitat and possibly interacted.
After scientists found an extinct burrowing amphibian on Eastern Shoshone land, members of the tribe gave it a name in their language.
Egyptians may have used hallucinogenic substances as part of a fertility rite, researchers said.
Here’s how to extend the life of your Thanksgiving leftovers — without getting sick.
China’s push to develop alternative proteins is not a threat to America. It’s good for the planet.
Robert F. Kennedy Jr. and other candidates for top health posts are at odds with the drug industry, setting the stage for tense battles over regulatory changes.
Studying bromalites helped paleontologists piece together how the reptiles came to rule a part of the prehistoric world.
A video of a dog on a pyramid took off on social media — but only after it was appropriated and doctored.
In “The Miraculous From the Material,” the best-selling author Alan Lightman examines the science behind the wonder.
Un grupo de científicos dice haber descubierto cómo los pepinillos del diablo logran disparar sus semillas hasta unos 12 metros de distancia.
After Ethiopian wolves feed on their favorite rodents, they may be enjoying a bit of dessert and in the process helping pollinate plants known as torch lilies.
Scientists study the flight of hummingbirds to design robots for drone warfare.
Japan is off to a shaky start in its efforts to break into the space rocket market dominated by Elon Musk’s SpaceX.
Basándose en una simulación de los gigantes helados, un científico planteó la hipótesis de que sus extraños campos magnéticos se deben a una capa fluida.
Scientists say they’ve worked out how the plant can fire its seeds up to almost 40 feet.
A scientist simulated the contents of the ice giant worlds, and found that a fluid layer may explain each planet’s strange magnetic field.
Labs around the world are trying to turn cells into autobiographers, tracking their own development from embryos to adults.
With drones and A.I., researchers managed to double the number of mysterious geoglyphs in a matter of months.
Scientists simulated a situation that may offer an improved explanation for how the Red Planet ended up with small Phobos and tiny Deimos.
Researchers describe a link between genetic relatedness and sophisticated tool use in primates in East and Central Africa, suggesting their culture is cumulative.
Astronomers zoomed in on a stellar behemoth in the Larger Magellanic Cloud, a galaxy that orbits about 160,000 light-years from the Milky Way.
El presidente electo Donald Trump se unió a Elon Musk en el sexto vuelo de prueba del prototipo del cohete de su empresa que podría llevar personas a la Luna, o incluso a Marte.
A second Trump administration could alter the lives of all sorts of animals, whether they live in laboratories, zoos, fields or forests.
President-elect Donald Trump joined Elon Musk in Texas and watched the launch from a nearby location on Tuesday. While the Starship’s giant booster stage was unable to repeat a “chopsticks” landing, the vehicle’s upper stage successfully splashed ...
Journals had retracted papers on superconductors that worked at room temperature and materials science that involved Ranga Dias.
President-elect Donald J. Trump joined Elon Musk, as his company’s prototype moon and Mars rocket carried out a sixth test flight that showed a mix of progress and setbacks.
As the glaciers of South America retreat, the supply of freshwater is dwindling and its quality is getting worse.
The Homotherium cub was preserved in Siberian permafrost with its dark fur and flesh intact.
President Biden pledged financial help to protect the Amazon during a visit to Brazil, making one final push to combat climate change before the end of his term.
For a century, exoplanet hunters have “discovered” planets around a nearby star, only to retract the claims. But the latest find is for real.
At Dartmouth, long before the days of laptops and smartphones, he worked to give more students access to computers. That work helped propel generations into a new world.
Este fenómeno produce algunos de los meteoros más rápidos del año, aunque la luna casi llena puede dificultar su observación.
The event produces some of the year’s fastest meteors, although the nearly full moon may make them challenging to spot.
Fifty years ago, the famed Arecibo message was fired into space to make contact with intelligent extraterrestrials. Now is the time to try again.
Behind the scenes at a Chicago zoo, chimpanzees who spent years entertaining humans are learning to befriend their own kind.
The agency’s top medical official was responding to rumors that Suni Williams had lost an unusual amount of weight during an extended stay in orbit.
The National Museum of Mathematics in New York is expected to open a 34,363-square-foot building in 2026.
A researcher thinks he knows what has been coming ashore on miles of beaches. Canada’s environmental agency says it is still looking into it.
Ball pythons were long assumed to be solitary, but scientists discovered the snakes in captivity prefer each others’ company when given the chance to live socially.
“The Impossible Man,” by Patchen Barss, depicts the British mathematical physicist and Nobelist Sir Roger Penrose in all his iconoclastic complexity.
A study of Gila monster venom helped start the revolution in weight-loss drugs. But scientists think that’s just the beginning.
It took nearly 25 years for biologists to discover that a swimming and glowing organism in the ocean’s midnight zone was actually a sea slug.
No one saw a Mekong giant salmon carp for 15 years, but then the species was spotted in areas of Cambodia that suggest it may be found in more locations.
In “Four Points of the Compass,” Jerry Brotton explores the disorienting, dizzying history of our relationship to direction.
Covid learning loss and chronic absenteeism aren’t going to fix themselves
Dr. Fauci testified before a House panel investigating Covid’s origins. The panel found emails suggesting that his aides were skirting public records laws.
A scientist finds beauty in the “visual synonyms” that exist in images seen through microscopes and telescopes.
A long-awaited new policy broadens the type of regulated viruses, bacteria, fungi and toxins, including those that could threaten crops and livestock.
A heated hearing produced no new evidence that Peter Daszak or his nonprofit, EcoHealth Alliance, were implicated in the Covid outbreak.
Prosecutors said Keith Berman falsely claimed he had invented a blood test that could detect Covid-19 in 15 seconds. His lawyer said he had put “genuine effort” into developing such a test.
Los científicos que estudian la evolución continua del virus y las respuestas inmunitarias del organismo esperan evitar un rebrote y comprender mejor la covid prolongada.
Scientists studying the virus’s continuing evolution, and the body’s immune responses, hope to head off a resurgence and to better understand long Covid.
A new study of camera-trap images complicates the idea that all wildlife thrived during the Covid lockdowns.
In the Panamanian rainforest, scientists found the first known plant species to transform decaying tissue into a new source of nutrients.
Newly released documents indicate that a U.S. genetic database had received the sequence of the coronavirus two weeks before it was made public by others.
The dominant variant of the coronavirus has proved to be not only staggeringly infectious, but an evolutionary marvel.
Scientists doing “gain-of-function” research said that heightened fears of lab leaks are stalling studies that could thwart the next pandemic virus.
High-security labs, like this one at Penn State, are at the center of a debate over research that alters viruses to make them more dangerous.
Schools run by the Defense Department educate 66,000 children of civilian employees and service members.
Let’s bring back an era of accountability.
Despite billions in federal aid, students are not making up ground in reading and math: “We are actually seeing evidence of backsliding.”
The results are the federal government’s last major data release on the academic effects of the coronavirus pandemic.
Strict pandemic lockdowns may have allowed animals to range more widely and spend time closer to roads, a new study suggests.
Pandemic aid was supposed to help students recover from learning loss, but results have been mixed.
Tokophobia, as it’s called, is not often studied in the United States. But a new survey finds that it may be very common, particularly among Black women and in disadvantaged communities.
Lab safety doesn’t need to torpedo scientific progress.
The latest test results continue a nearly decade-long decline. Try a sample quiz to test your knowledge.
After analyzing genetic data swabbed from a Wuhan market in early 2020, a virologist said it was unclear if animals for sale there had been infected.
Leaders on the continent have vowed that if there is another pandemic, they won’t be shut out of the vaccine market.
Scientists from the Chinese C.D.C. confirmed that DNA from raccoon dogs and other animals susceptible to the coronavirus was found at the market in early 2020.
In a much-anticipated study, experts described a swab that was positive for the coronavirus and contained loads of genetic material from raccoon dogs.
Genetic samples from the market were recently uploaded to an international database and then removed after scientists asked China about them.
Some medications, like Ritalin and Vicodin, would require an in-person doctor’s visit under the new rules, a reaction to the pandemic-era rise of telemedicine.
Moderna has paid $400 million to the government for a chemical technique key to its vaccine. But the parties are still locked in a high-stakes dispute over a different patent.
Kizzmekia Corbett helped lead a team of scientists contributing to one of the most stunning achievements in the history of immunizations: a highly effective, easily manufactured vaccine against Covid-19.
Readers discuss experimentation on lab animals. Also: Racism in America; preparing for the next pandemic; maternal deaths; Amazon’s donations.
The White House will decide whether to adopt the panel’s recommendations on so-called gain of function experiments.
An internal federal watchdog said that the health agency had not given adequate oversight to EcoHealth Alliance, which had been awarded $8 million in grants.
A young version of the coronavirus makes up one-quarter of Covid cases across the United States and over 70 percent of new cases in the Northeast.
Plus China’s vaccination pivot and the year’s most stylish “people.”
Plus, China’s sluggish economy and the arrest of the Lockerbie bombing suspect.
Al cumplirse el aniversario del descubrimiento de la variante, los expertos en virología siguen intentando ponerse al día con la rápida transformación de ómicron.
One year after the variant’s discovery, virologists are still scrambling to keep up with Omicron’s rapid evolution.
Students missed a lot of high school instruction. Now many are behind, especially in math, and getting that degree could be harder.
In a vacuum, test score declines look like bad news. But none of this happened in a vacuum.
The report, signed by Senator Richard Burr, foreshadows a new wave of political wrangling over Covid’s origins if Republicans gain control of the House or Senate.
The results, from what is known as the nation’s report card, offer the most definitive picture yet of the pandemic’s devastating impact on students.
Mouse experiments at Boston University have spotlighted an ambiguous U.S. policy for research on potentially dangerous pathogens.
Benjamin Franklin Elementary in Connecticut overhauled the way it taught — and the way it ran the classroom. Every minute counted.
Readers respond to the latest Russian attacks in Ukraine. Also: The wonders of math; pandemic spending; Republicans and crime.
Maitland Jones, un profesor respetado, defendió sus estándares. Pero los estudiantes hicieron un reclamo y la universidad lo despidió.
Maitland Jones Jr., a respected professor, defended his standards. But students started a petition, and the university dismissed him.
The first standardized test results that capture how most city schoolchildren did during the pandemic offered a mixed picture.
La decimotercera variante con nombre del coronavirus parece tener una capacidad sorprendente para evolucionar con nuevas particularidades.
Omicron, the 13th named variant of the coronavirus, seems to have a remarkable capacity to evolve new tricks.
Many employees reduce their hours or stop working to help ailing family members. But it may be years before they fully return to the work force, studies indicate.
The results of a national test showed just how devastating the last two years have been for 9-year-old schoolchildren, especially the most vulnerable.
Urgently needed: teachers in struggling districts, certified in math or special education. Perks: maybe a pay raise, or how about a four-day week?
Here’s how a scrappy team of scientists, public health experts and plumbers is embracing wastewater surveillance as the future of disease tracking.
El coronavirus, como muchos otros virus, evoluciona deprisa. ¿Los seres humanos y su ingenio podrían adaptarse más rápido a él?
Human ingenuity must keep up with the coronavirus.
The papers, which have not yet been published in scientific journals, suggest that testing just a single type of sample is likely to miss a large share of infections.
A new report estimates that it may take students at least three to five years to recover from the pandemic. Federal relief money will most likely have run out by then.
Covid precautions created a global slowdown in human activity — and an opportunity to learn more about the complex ways we affect other species.
Working in a laboratory in Paris, scientists gave a close relative of the Covid virus the chance to evolve to be more like its cousin.
Pandemic shutdowns and restrictions led to a 20 percent drop in average daily physical activity among children and adolescents, a new analysis shows.
The vaccine has not yet been authorized but is expected to be soon.
The myxoma virus, fatal to millions of Australian rabbits, is a textbook example of the unexpected twists in the evolution of viruses and their hosts.
Officials have also been trying to determine whether the cases represent a new phenomenon or are simply a new recognition of one that has long existed; there have always been a subset of pediatric hepatitis cases with no clear cause.
“The lack of political cooperation from China continues to stifle any meaningful progress,” one expert said.
In his essay collection “Virology,” Joseph Osmundson examines the myriad ways we coexist with viruses.
The spread of the subvariants adds more uncertainty to the trajectory of the pandemic in the United States.
Ravindra Gupta, who led the efforts that resulted in the second case of a patient being cured of H.I.V., was drawn into pandemic research.
Readers discuss the Florida Department of Education’s objections to some of the topics in math textbooks. Also: The Ukraine war; mask mandates.