Un solsticio del alma
En español, Today
El corresponsal de asuntos cósmicos del Times se retira, pero no quita los ojos de las estrellas.
OpenAI Unveils New A.I. That Can ‘Reason’ Through Math and Science Problems
Business, Yesterday
The artificial intelligence start-up said the new system, OpenAI o3, outperformed leading A.I. technologies on tests that rate skills in math, science, coding and logic.
One of 2024’s Last Meteor Showers Is About to Reach Its Peak
Science, Yesterday
The astronomical event, which overlaps with the Winter Solstice, is often overlooked because of the winter chill.
A Solstice of the Soul
Science, Yesterday
For his next trick, your cosmic correspondent for the past quarter-century will (try to) retire.
A Mouse That Swims and Dozens More Species Are Discovered in a Peruvian Jungle
Science, Yesterday
A 38-day expedition in the remote Alto Mayo region, where development threatens wild habitats, turned up one previously unknown animal after another.
Grief Makes Us Time Travelers
Styles, Yesterday
A neuroscientist studying memory, I used to believe time was linear. Then my mother had a stroke.
A Lottery Drawing Included Four Consecutive Numbers. What Are the Odds?
Express, December 19
A Mega Millions drawing turned up 66, 67, 68 and 69. Is that unusual?
Popular Arthritis Drug for Dogs May Have Severe Side Effects, F.D.A. Says
Science, December 19
The agency recommended that the maker of Librela update its label to reflect the possibility of more serious adverse reactions.
Chinese Spacewalk Apparently Breaks a Record (Barely)
Foreign, December 19
China said two of its astronauts spent nine hours outside the Tiangong Space Station. The longest previous spacewalk, by Americans, was eight hours and 56 minutes.
Chinese Astronauts Spend 9 Hours Outside Space Station
Video, December 19
The spacewalk appears to be the longest in history, barely breaking a record set by American astronauts in 2001.
This Brazilian Velvet Ant Is So Dark That It’s Ultrablack
Science, December 17
Scientists found that the dark markings on a species of fluffy wasp reflected less than 1 percent of light.
Elon Musk and SpaceX Face Federal Reviews After Violations of Security Reporting Rules
Business, December 17
Federal agencies have opened at least three reviews into whether the company and its leader complied with disclosure protocols intended to protect state secrets, people with knowledge of the matter said.
A Grisly Discovery at a Bronze Age Mass Grave: The Victims Were Eaten, Too
Express, December 17
“It’s taken us all aback,” said a professor who led a study revealing that 37 people in a prehistoric site in England were likely consumed by their attackers.
Orrin H. Pilkey, Warrior in a Fight to Save Imperiled Beaches, Dies at 90
Obits, December 16
An eminent geologist, he argued against putting condos and hotels on vulnerable coastal landscapes. Environmentalists applauded; many others didn’t.
Un ‘segundo árbol de la vida’ podría causar estragos, advierten los científicos
En español, December 16
Según un grupo de biólogos, la investigación sobre las llamadas “células espejo”, que desafían las propiedades fundamentales de los organismos vivos, debería prohibirse por ser demasiado peligrosa.
For Wild Animals, the Bird Flu Disaster Is Already Here
Science, December 13
Scientists are concerned that the H5N1 virus could set off another human pandemic. But it is already putting species under pressure in the wild.
Oldest Human Genomes Reveal How a Small Group Burst Out of Africa
Science, December 12
DNA from European fossils dating back 45,000 years offers new clues to how our species spread across the world.
Superflares Erupt From Stars Like Our Sun Once Every 100 Years
Science, December 12
New findings suggest that an extraordinarily powerful and dangerous burst of radiation might flare from our sun in the future.
A ‘Second Tree of Life’ Could Wreak Havoc, Scientists Warn
Science, December 12
Research on so-called mirror cells, which defy fundamental properties of living organisms, should be prohibited as too dangerous, biologists said.
Cómo ver la lluvia de meteoros de las Gemínidas
En español, December 12
La lluvia se forma a partir de los restos de un asteroide y alcanza su punto máximo este fin de semana. Pero una luna casi llena podría interferir en su observación.
The Geminids Meteor Shower Is Peaking. Here’s How to Watch.
Science, December 12
The shower forms from the debris of an asteroid and peaks this weekend. But a nearly full moon could interfere with viewing.
It’s Time to Talk About Pornography, Scholars Say
Science, December 12
More adolescents than ever are watching it. What’s needed, researchers say, are frank conversations and “porn literacy.”
120 Miles of Russian Forest Couldn’t Keep These Two Tigers Apart
Science, December 11
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.
La computación cuántica está más cerca tras otro avance de Google
En español, December 10
Google presentó una máquina experimental capaz de realizar tareas que una supercomputadora tradicional no podría dominar en 10 cuatrillones de años.
The Plight of the Palestinian Scientist
Science, December 10
Four Palestinian researchers describe how conflict in Gaza and the West Bank has hindered their careers in science and medicine.
Quantum Computing Inches Closer to Reality After Another Google Breakthrough
Business, December 9
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.)
24 Things That Happened for the First Time in 2024
Special Sections, December 9
A series of surprising milestones, events and trends that were unprecedented until now.
Why Are We So Obsessed With the Moon?
Special Sections, December 7
Lunar exploration in the 21st century offers a unique opportunity to unite us.
World’s Oldest Known Wild Bird Lays an Egg at 74
Express, December 6
Wisdom, a Laysan albatross, has outlived at least three mates and the researcher who outfitted her with a tracking band in 1956.
When They Hear Plants Crying, Moths Make a Decision
Science, December 6
A new study suggests that the insects rely on the sounds made by distressed vegetation to guide important reproductive choices.
Motherhood at 74: World’s Oldest Known Wild Bird Lays Egg
Video, December 5
Wisdom, a 74-year-old Laysan albatross, laid an egg at Midway Atoll National Wildlife Refuge at the northwestern edge of the Hawaiian Archipelago.
NASA Artemis Moon Missions Delayed Until 2026 and 2027
Science, December 5
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.
How the Messy Process of Milking Cows Can Spread Bird Flu
Science, December 5
On America’s large dairy farms, milking is a vast operation, and the potential for disease transmission is worrying, health experts say.
The Warning
Interactive, December 5
No shockwave. No mushroom cloud. But a space nuke would change life on Earth forever.
Richard Hamilton, Who Helped Solve a Mathematical Mystery, Dies at 81
Obits, December 4
He came up with an innovative equation called the Ricci flow that helped mathematicians explore fundamental questions that were once out of reach.
U.S. Students Posted Dire Math Declines on an International Test
National, December 4
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.
Mammoth: It’s What Was for Dinner
Science, December 4
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.
Trump Picks Jared Isaacman, an Entrepreneur and Private Astronaut, to Lead NASA
Science, December 4
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
Science, December 4
GenCast, from the company’s DeepMind division, outperformed the world’s best predictions of deadly storms as well as everyday weather.
Drought in the Northeast: The Causes and Consequences
Letters, December 3
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.
Giant Redheaded Centipedes Are Venom Mixologists
Science, December 1
The arthropods can tailor their toxins depending on whether they are hunting prey or defending themselves from predators, according to a new study.
Los cárteles en México reclutan estudiantes de química para fabricar fentanilo
En español, December 1
Los grupos delictivos convierten los campus universitarios mexicanos en centros de reclutamiento, atrayendo a estudiantes de química con grandes ganancias.
Mexican Cartels Lure Chemistry Students to Make Fentanyl
Foreign, December 1
Criminals turn college campuses into recruitment hubs, recruiting chemistry students in Mexico with big paydays.
Turbulence on an Airplane From a Storm Can Start Earlier Than You Think
Science, November 30
This is your captain speaking: You may need to buckle those seatbelts a lot sooner than you’re used to.
Killer Whales Hunt and Feast on the Largest Fish On Earth
Science, November 29
Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers.
Footprints Suggest Different Human Relatives Lived Alongside One Another
Science, November 28
A discovery in northern Kenya hints that two extinct species that were our ancient relatives shared the same habitat and possibly interacted.
A Fossil Gets Its Name From a Revived Indigenous Language
Science, November 28
After scientists found an extinct burrowing amphibian on Eastern Shoshone land, members of the tribe gave it a name in their language.
Psychedelic Traces Found on Mug From Ancient Egypt
Science, November 28
Egyptians may have used hallucinogenic substances as part of a fertility rite, researchers said.
Is That Turkey Still Good?
Well, November 28
Here’s how to extend the life of your Thanksgiving leftovers — without getting sick.
China Is on a Quest for the Holy Grail of Meat. Let’s Hope It Succeeds.
Op Ed, November 28
China’s push to develop alternative proteins is not a threat to America. It’s good for the planet.
Hoping for Allies Among Trump’s Health Picks, Pharma Faces Hostility
Science, November 27
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.
Dinosaur Domination Is Marked in a Timeline of Vomit and Feces Fossils
Science, November 27
Studying bromalites helped paleontologists piece together how the reptiles came to rule a part of the prehistoric world.
A Stray Dog Climbed an Egyptian Pyramid. Along Came a Paraglider.
Science, November 27
A video of a dog on a pyramid took off on social media — but only after it was appropriated and doctored.
What Exactly Is Morning Mist? And Other Questions.
Book Review, November 27
In “The Miraculous From the Material,” the best-selling author Alan Lightman examines the science behind the wonder.
Los bombarderos botánicos: la propagación explosiva de los pepinillos del diablo
En español, November 27
Un grupo de científicos dice haber descubierto cómo los pepinillos del diablo logran disparar sus semillas hasta unos 12 metros de distancia.
These Wolves Like a Little Treat: Flower Nectar
Science, November 26
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.
On the Wings of War
Science, November 26
Scientists study the flight of hummingbirds to design robots for drone warfare.
Rocket Engine Fire Stalls Japan’s Ambitions to Launch Satellites
Business, November 26
Japan is off to a shaky start in its efforts to break into the space rocket market dominated by Elon Musk’s SpaceX.
Urano y Neptuno podrían esconder vastos océanos de agua
En español, November 25
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.
Squirting Cucumbers Shoot Their Seeds Like Botanical Bombardiers
Science, November 25
Scientists say they’ve worked out how the plant can fire its seeds up to almost 40 feet.
Vast Oceans of Water May Be Hiding Within Uranus and Neptune
Science, November 25
A scientist simulated the contents of the ice giant worlds, and found that a fluid layer may explain each planet’s strange magnetic field.
‘DNA Typewriters’ Can Record a Cell’s History
Science, November 25
Labs around the world are trying to turn cells into autobiographers, tracking their own development from embryos to adults.
Hundreds More Nazca Lines Emerge in Peru’s Desert
Science, November 23
With drones and A.I., researchers managed to double the number of mysterious geoglyphs in a matter of months.
An Asteroid’s Destruction May Have Given Mars Rings, Then Moons
Science, November 22
Scientists simulated a situation that may offer an improved explanation for how the Red Planet ended up with small Phobos and tiny Deimos.
From Chimpan-A to Chimpanzee, These Apes May Have Humanlike Culture
Science, November 21
Researchers describe a link between genetic relatedness and sophisticated tool use in primates in East and Central Africa, suggesting their culture is cumulative.
First Close-Up of Star Outside Our Galaxy Shows a Giant About to Blow
Science, November 21
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.
The Education Crisis Neither Candidate Will Address
Op Ed, October 9
Covid learning loss and chronic absenteeism aren’t going to fix themselves
Fauci Grilled by Lawmakers on Masks, Vaccine Mandates and Lab Leak Theory
Science, June 3
Dr. Fauci testified before a House panel investigating Covid’s origins. The panel found emails suggesting that his aides were skirting public records laws.
Supernova or Coronavirus: Can You Tell the Difference?
Science, May 21
A scientist finds beauty in the “visual synonyms” that exist in images seen through microscopes and telescopes.
U.S. Tightens Rules on Risky Virus Research
Science, May 7
A long-awaited new policy broadens the type of regulated viruses, bacteria, fungi and toxins, including those that could threaten crops and livestock.
Republicans Step Up Attacks on Scientist at Heart of Lab Leak Theory
Science, May 1
A heated hearing produced no new evidence that Peter Daszak or his nonprofit, EcoHealth Alliance, were implicated in the Covid outbreak.
Biotech Exec Gets 7 Years in Prison for False Claims About Rapid Covid-19 Test
Express, April 13
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.
¿Cuál es la siguiente fase del coronavirus?
En español, March 23
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.
What’s Next for the Coronavirus?
Science, March 22
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.
Where the Wild Things Went During the Pandemic
Science, March 18
A new study of camera-trap images complicates the idea that all wildlife thrived during the Covid lockdowns.
A Fern’s ‘Zombie’ Fronds Sprout Unusual Roots
Science, February 25
In the Panamanian rainforest, scientists found the first known plant species to transform decaying tissue into a new source of nutrients.
Before the Coronavirus Pandemic, Overlooked Clues From Chinese Scientists
Science, January 18
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.
Omicron, Now 2 Years Old, Is Not Done With Us Yet
Science, November 21
The dominant variant of the coronavirus has proved to be not only staggeringly infectious, but an evolutionary marvel.
Lab Leak Fight Casts Chill Over Virology Research
Science, October 16
Scientists doing “gain-of-function” research said that heightened fears of lab leaks are stalling studies that could thwart the next pandemic virus.
Inside a High-Security Virus Lab
Interactive, October 16
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.
The Nation’s Top-Performing Public School System
N Y T Now, October 10
Schools run by the Defense Department educate 66,000 children of civilian employees and service members.
We Can Fight Learning Loss Only With Accountability and Action
Op Ed, September 5
Let’s bring back an era of accountability.
U.S. Students’ Progress Stagnated Last School Year, Study Finds
National, July 11
Despite billions in federal aid, students are not making up ground in reading and math: “We are actually seeing evidence of backsliding.”
What the New, Low Test Scores for 13-Year-Olds Say About U.S. Education Now
National, June 21
The results are the federal government’s last major data release on the academic effects of the coronavirus pandemic.
Wild Mammals Roamed When Covid Kept Humans Home
Science, June 8
Strict pandemic lockdowns may have allowed animals to range more widely and spend time closer to roads, a new study suggests.
Schools Received Billions in Stimulus Funds. It May Not Be Doing Enough.
Washington, June 5
Pandemic aid was supposed to help students recover from learning loss, but results have been mixed.
Many Women Have an Intense Fear of Childbirth, Survey Suggests
Science, May 16
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.
We Could Easily Make Risky Virological Research Safer
Op Ed, May 10
Lab safety doesn’t need to torpedo scientific progress.
It’s Not Just Math and Reading: U.S. History Scores for 8th Graders Plunge
National, May 3
The latest test results continue a nearly decade-long decline. Try a sample quiz to test your knowledge.
Scientist Revisits Data on Raccoon Dogs and Covid, Stressing the Unknowns
Science, April 29
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.
Can Africa Get Close to Vaccine Independence? Here’s What It Will Take.
Science, April 25
Leaders on the continent have vowed that if there is another pandemic, they won’t be shut out of the vaccine market.
China Publishes Data Showing Raccoon Dog DNA at Wuhan Market
Science, April 5
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.
Wuhan Market Samples Contained Covid and Animal Mixtures, Report Says
Science, March 21
In a much-anticipated study, experts described a swab that was positive for the coronavirus and contained loads of genetic material from raccoon dogs.
New Data Links Pandemic’s Origins to Raccoon Dogs at Wuhan Market
Science, March 17
Genetic samples from the market were recently uploaded to an international database and then removed after scientists asked China about them.
Biden Proposal Would Ban Online Prescribing of Certain Drugs
Science, February 25
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.
After Long Delay, Moderna Pays N.I.H. for Covid Vaccine Technique
Science, February 23
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.
She Helped Unlock the Science of the Covid Vaccine
Science, February 9
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.
When Animals Are Used in Research
Letters, January 31
Readers discuss experimentation on lab animals. Also: Racism in America; preparing for the next pandemic; maternal deaths; Amazon’s donations.
Expert Panel Votes for Stricter Rules on Risky Virus Research
Science, January 27
The White House will decide whether to adopt the panel’s recommendations on so-called gain of function experiments.
N.I.H. Did Not Properly Track a Group Studying Coronaviruses, Report Finds
Science, January 26
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.
Health Experts Warily Eye XBB.1.5, the Latest Omicron Subvariant
Science, January 7
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.
Your Tuesday Briefing: China’s Space Push
N Y T Now, December 12
Plus China’s vaccination pivot and the year’s most stylish “people.”
Your Monday Briefing: The World Cup Semifinals Loom
N Y T Now, December 11
Plus, China’s sluggish economy and the arrest of the Lockerbie bombing suspect.
Ómicron cumple un año. Así ha evolucionado
en Español, November 29
Al cumplirse el aniversario del descubrimiento de la variante, los expertos en virología siguen intentando ponerse al día con la rápida transformación de ómicron.
Happy Birthday, Omicron
Science, November 26
One year after the variant’s discovery, virologists are still scrambling to keep up with Omicron’s rapid evolution.
The Pandemic Generation Goes to College. It Has Not Been Easy.
National, November 1
Students missed a lot of high school instruction. Now many are behind, especially in math, and getting that degree could be harder.
Pandemic Learning Loss Is Not an Emergency
Op Ed, October 29
In a vacuum, test score declines look like bad news. But none of this happened in a vacuum.
G.O.P. Senator’s Report on Covid Origins Suggests Lab Leak, but Offers Little New Evidence
Science, October 27
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.
Math Scores Fell in Nearly Every State, and Reading Dipped on National Exam
National, October 24
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.
Lab Manipulations of Covid Virus Fall Under Murky Government Rules
Science, October 22
Mouse experiments at Boston University have spotlighted an ambiguous U.S. policy for research on potentially dangerous pathogens.
How One School Is Beating the Odds in Math, the Pandemic’s Hardest-Hit Subject
National, October 15
Benjamin Franklin Elementary in Connecticut overhauled the way it taught — and the way it ran the classroom. Every minute counted.
Russia’s New Onslaught Against Ukraine
Letters, October 10
Readers respond to the latest Russian attacks in Ukraine. Also: The wonders of math; pandemic spending; Republicans and crime.
¿Quién tenía la culpa de que los alumnos de la Universidad de Nueva York estuvieran reprobando química orgánica?
en Español, October 5
Maitland Jones, un profesor respetado, defendió sus estándares. Pero los estudiantes hicieron un reclamo y la universidad lo despidió.
At N.Y.U., Students Were Failing Organic Chemistry. Who Was to Blame?
National, October 3
Maitland Jones Jr., a respected professor, defended his standards. But students started a petition, and the university dismissed him.
N.Y.C. Children Held Ground in Reading, but Lagged in Math, Tests Show
Metro, September 28
The first standardized test results that capture how most city schoolchildren did during the pandemic offered a mixed picture.
¿La variante ómicron llegó para quedarse?
en Español, September 27
La decimotercera variante con nombre del coronavirus parece tener una capacidad sorprendente para evolucionar con nuevas particularidades.
Why Omicron Might Stick Around
Science, September 22
Omicron, the 13th named variant of the coronavirus, seems to have a remarkable capacity to evolve new tricks.
The Quiet Cost of Family Caregiving
Science, September 4
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 Pandemic Erased Two Decades of Progress in Math and Reading
National, September 1
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.
How Bad Is the Teacher Shortage? Depends Where You Live.
National, August 29
Urgently needed: teachers in struggling districts, certified in math or special education. Perks: maybe a pay raise, or how about a four-day week?
Wastewater Disease Tracking: A Photographic Journey From the Sewer to the Lab
Interactive, August 17
Here’s how a scrappy team of scientists, public health experts and plumbers is embracing wastewater surveillance as the future of disease tracking.
El viaje evolutivo de la COVID-19 ha sido funesto e impresionante
en Español, August 11
El coronavirus, como muchos otros virus, evoluciona deprisa. ¿Los seres humanos y su ingenio podrían adaptarse más rápido a él?
We Are Still in a Race Against the Coronavirus
Op Ed, August 10
Human ingenuity must keep up with the coronavirus.
Combined nasal and throat testing swabs would detect more Omicron infections, two papers suggest.
Science, July 22
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.
Students Are Learning Well Again. But Full Recovery? That’s a Long Way Off.
National, July 19
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.
Did Nature Heal During the Pandemic ‘Anthropause’?
Science, July 16
Covid precautions created a global slowdown in human activity — and an opportunity to learn more about the complex ways we affect other species.
Bat Virus Studies Raise Questions About Laboratory Tinkering
Science, July 15
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.
The pandemic kept many children less active around the world, researchers find.
Express, July 11
Pandemic shutdowns and restrictions led to a 20 percent drop in average daily physical activity among children and adolescents, a new analysis shows.
The U.S. government will buy 3.2 million doses of Novavax’s Covid vaccine.
Science, July 11
The vaccine has not yet been authorized but is expected to be soon.
Think All Viruses Get Milder With Time? Not This Rabbit-Killer.
Science, June 20
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.
Unexplained hepatitis is not more common in U.S. children than before the pandemic, a C.D.C. study suggests.
Science, June 14
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.
Mysteries Linger About Covid’s Origins, W.H.O. Report Says
Science, June 9
“The lack of political cooperation from China continues to stifle any meaningful progress,” one expert said.
Reckoning With a Pandemic, as a Doctor and a Human
Book Review, June 8
In his essay collection “Virology,” Joseph Osmundson examines the myriad ways we coexist with viruses.
Two new versions of Omicron are gaining ground in the U.S., according to C.D.C. estimates.
Science, June 8
The spread of the subvariants adds more uncertainty to the trajectory of the pandemic in the United States.
He Helped Cure the ‘London Patient’ of H.I.V. Then He Turned to Covid.
Special Sections, June 6
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.
In Florida, Social-Emotional Learning + Math = Rejection
Letters, May 2
Readers discuss the Florida Department of Education’s objections to some of the topics in math textbooks. Also: The Ukraine war; mask mandates.