T/science

The Algebra Problem: How Middle School Math Became a National Flashpoint
New York, Today

Top students can benefit greatly by being offered the subject early. But many districts offer few Black and Latino eighth graders a chance to study it.

Supernova or Coronavirus: Can You Tell the Difference?
Science, Yesterday

A scientist finds beauty in the “visual synonyms” that exist in images seen through microscopes and telescopes.

Un fragmento de cometa iluminó la noche de España y Portugal
En español, May 20

El fulgurante destello que surcó el cielo nocturno el sábado era el fragmento de un cometa que se desplazaba a unos 160.000 kilómetros por hora, según los expertos.

How the Cockroach Took Over the World
Science, May 20

A genetic analysis of the German cockroach explained its rise in southern Asia millenniums ago, and how it eventually turned up in your kitchen.

Legalized Weed Is Landing More Seniors in the E.R.
Science, May 20

In Canada, cannabis poisonings rose sharply among people 65 and older after the country legalized the drug, a new study found.

The Northern Lights I Did Not See
Opinion, May 20

On this impossible, glorious planet, any creature who is tuned for beauty is sure to behold it.

Comet Fragment Explodes in Dark Skies Over Spain and Portugal
Science, May 20

A brilliant flash of blue, green and white on Saturday night came from a shard of an as yet unidentified comet that was moving around 100,000 miles per hour, experts said.

Comet Fragment Flashes in the Night Sky Over Spain and Portugal
Video, May 20

A bright object broke up in Earth’s atmosphere on Saturday night, illuminating night skies over parts of Spain and Portugal. Experts say it was a fragment of a comet, perhaps only a few feet in size.

63 Years Later, First Black Man Trained as Astronaut Goes to Space
Express, May 19

Edward Dwight was among the first pilots that the United States was training to send to space in 1961, but he was passed over. On Sunday, he finally made it on a Blue Origin flight.

In Britain, Chasing a Glimpse of the Northern Lights
Express, May 18

Sightings of the aurora borealis are unlikely in the U.K. this weekend, but the northern lights could return on Monday, forecasters said.

New Star Wars Plan: Pentagon Rushes to Counter Threats in Orbit
Washington, May 17

Citing rapid advances by China and Russia, the United States is building an extensive capacity to fight battles in space.

When an Eel Takes a Bite Then an Octopus Might Claim an Eyeball
Science, May 17

Videos filmed by divers show that choking, blinding and sacrificing limbs are all in the cephalopods’ repertoire.

La diplomacia de Musk: cautivar a la derecha mundial para beneficiarse
En español, May 16

Elon Musk ha creado una constelación de jefes de Estado aliados —Javier Milei en Argentina, Narendra Modi en India— para impulsar sus políticas y expandir su imperio empresarial.

Scientists Calculated the Energy Needed to Carry a Baby. Shocker: It’s a Lot.
Science, May 16

In humans, the energetic cost of pregnancy is about 50,000 dietary calories — far higher than previously believed, a new study found.

The Itsy Bitsy Spider Inspired a Microphone
Science, May 16

If spiders use their webs like a large external eardrum, researchers reasoned, perhaps spider silk could be the basis for a powerful listening device.

Why Do People Make Music?
Science, May 15

In a new study, researchers found universal features of songs across many cultures, suggesting that music evolved in our distant ancestors.

The Unusual Evolutionary Journey of the Baobab Tree
Science, May 15

New research shows the “upside-down trees” originated in Madagascar and then caught a ride on ocean currents to reach mainland Africa and Australia.

What MAGA’s Beef With Lab-Grown Meat Says About the G.O.P.
Op Ed, May 15

Paul Krugman on how burgers became the focus of a conspiracy theory.

Why Did the Hotel Chain Hire a Marine Biologist?
Travel, May 15

Megan Morikawa of the Iberostar Group is applying science — and scale — to eliminate food waste, save coral and collaborate across the travel industry to cut carbon.

Fossil Catches Starfish Cousin in the Act of Cloning Itself
Science, May 14

The brittle star specimen suggests that the sea creatures have been splitting themselves in two to reproduce for more than 150 million years.

Alarmed by Climate Change, Astronomers Train Their Sights on Earth
Science, May 14

A growing number of researchers in the field are using their expertise to fight the climate crisis.

‘Failure to Thrive,’ or a Failure to Investigate?
Science, May 13

An outdated medical term often masks treatable illnesses, health experts contend.

¿Dónde posó la ‘Mona Lisa’? Tal vez en Lecco
En español, May 12

Esta idílica ciudad de Italia, a orillas del Lago Como, sería el escenario donde fue retratado el enigmático personaje de Leonardo da Vinci.

Where to See the Northern Lights on Sunday Night
Express, May 12

The best weather conditions for viewing the colorful light display will be in much of the West while New England was “a question mark,” a forecaster said.

Mona Lisa, Smile: You’re in Lecco, After All
Express, May 12

A mash-up of geology and art history has identified a likely setting for one of the world’s most famous paintings.

Can Parrots Converse? Polly Says That’s the Wrong Question.
Science, May 12

In a cautious new paper, scientists tried to determine whether an interactive speech board might enrich the life of a parrot named Ellie.

Elon Musk’s Diplomacy: Woo Right-Wing World Leaders. Then Benefit.
Business, May 12

Mr. Musk has built a constellation of like-minded heads of state — including Argentina’s Javier Milei and India’s Narendra Modi — to push his own politics and expand his business empire.

Northern Lights Set to Return During Extreme Solar Storm’s 2nd Night
Science, May 11

Electrical utilities said they weathered earlier conditions as persistent geomagnetic storms were expected to cause another light show in evening skies.

Northern Lights Glow in the Sky Amid Solar Storm
Video, May 11

Powerful solar flare activity made the aurora borealis visible unusually far south.

La tormenta solar se intensifica y llena el cielo de auroras boreales
En español, May 11

Las autoridades advirtieron sobre posibles apagones o interferencias en los sistemas de comunicación este fin de semana.

A New Tree of Flowering Plants? For Spring? Groundbreaking.
Science, May 11

By sequencing an enormous amount of data, a group of hundreds of researchers has gained new insights into how flowers evolved on Earth.

How to Observe the Northern Lights This Weekend
Express, May 10

The Space Weather Prediction Center said solar activity would be high again on Saturday.

Jim Simons, Math Genius Who Conquered Wall Street, Dies at 86
Obits, May 10

Using advanced computers, he went from M.I.T. professor to multibillionaire. His Medallion fund had 66 percent average annual returns for decades.

Solar Storm Intensifies, Filling Skies With Northern Lights
Science, May 10

Officials warned of potential blackouts or interference with navigation and communication systems this weekend, as well as auroras as far south as Southern California or Texas.

From Ancient Charcoal, Hints of Wildfires to Come
Science, May 10

By digging into the geologic record, scientists are learning how wildfires shaped — and were shaped by — climate change long ago.

Tuna Crabs, Neither Tuna Nor Crabs, Are Swarming Near San Diego
Science, May 9

Divers and marine biologists are getting a window into the lives of a red crustacean most often found in the guts of other species.

Massive Fossil Donation Helps Brazil’s National Museum Rise From the Ashes
Science, May 9

A gift from abroad of more than 1,100 Brazilian fossils aims to step up efforts to rebuild the country’s National Museum, which suffered major fire damage in 2018.

Why You Can Hear the Temperature of Water
Science, May 9

A science video maker in China couldn’t find a good explanation for why hot and cold water sound different, so he did his own research and published it.

The Ever-Resilient Pupfish Makes a Comeback in Death Valley
Science, May 9

The spring population of the critically endangered species is at a 25-year high, a surprising rebound in a tiny desert cave.

Google Unveils A.I. for Predicting Behavior of Human Molecules
Business, May 8

The system, AlphaFold3, could accelerate efforts to understand the human body and fight disease.

The Sex Lives of Cicadas, Revealed
Science, May 8

It may sound like a mosh pit out there. But to the participants, mating is a delicate, sonorous affair, fraught with potential missteps — and fungal zombies.

Afraid of Cicadas? This Entomologist Wants to Change That.
Science, May 8

Sammy Ramsey casts the mass emergence of the big, red-eyed bugs as a love story, not an insect apocalypse.

When These Snakes Play Dead, Soiling Themselves Is Part of the Act
Science, May 7

Dice snakes found on an island in southeastern Europe fully commit themselves to the role of ex-reptile.

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.

Scientists Find an ‘Alphabet’ in Whale Songs
Science, May 7

Sperm whales rattle off pulses of clicks while swimming together, raising the possibility that they’re communicating in a complex language.

Does NASA need two rides to the space station? Elon Musk says no.
Science, May 6

Who are the astronauts on the Starliner flight?
Science, May 6

Meat, Freedom and Ron DeSantis
Op Ed, May 6

A full plate of culture war and conspiracy theories.

What is Boeing’s Starliner spacecraft?
Science, May 6

What happens next with the delayed NASA astronaut launch.
Science, May 6

How to Know When a Good Dog Has Gone Bad
Science, May 5

Gov. Kristi Noem suggested that President Biden should have euthanized the family dog, as she did. Animal experts said that such an option should be a last resort.

Our Reporter on the Cicada Lifecycle
Video, May 4

Two periodical cicada broods are appearing in a 16-state area in the Midwest and Southeast for the first time in centuries.

Was the Stone Age Actually the Wood Age?
Science, May 4

Neanderthals were even better craftsmen than thought, a new analysis of 300,000-year-old wooden tools has revealed.

U.S. Seeks to Build World Pressure on Russia Over Space Nuclear Weapon
Washington, May 3

An American official said the United States had information undermining Russia’s claim that a device it is developing is for peaceful scientific research.

‘We Will Save Our Beef’: Florida Bans Lab-Grown Meat
Climate, May 3

Other states have also considered restrictions, citing concerns about farmers’ livelihoods and food safety, though the product isn’t expected to be widely available for years.

What Happens When NASA Loses Eyes on Earth? We’re About to Find Out.
Climate, May 3

Three long-running satellites will soon be switched off, forcing scientists to figure out how to adjust their views of our changing planet.

Maps of Two Cicada Broods, Reunited After 221 Years
Interactive, May 3

Brood XIII and Brood XIX are making their first dual appearance since 1803.

China Launches Spacecraft to the Far Side of the Moon
Science, May 3

If successful, the Chang’e-6 mission will be the first in history to return a sample from a part of the moon that we never get to see from Earth.

Larry Young, Who Studied the Chemistry of Love, Dies at 56
Obits, May 2

Professor Young’s experiments with prairie voles revealed what poets never could: how the brain processes that fluttering feeling in the heart.

Watch the Eta Aquarid Meteor Shower Reach Its Peak
Science, May 2

The event will be active when the moon is just a sliver in the sky, but it is less easy to see in the Northern Hemisphere than other meteor showers.

Orangutan, Heal Thyself
Science, May 2

For the first time, scientists observed a primate in the wild treating a wound with a plant that has medicinal properties.

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.

Mountain Goats Are Not Avalanche-Proof
Science, May 1

The scene ends badly, as you might imagine.

What Makes a Society More Resilient? Frequent Hardship.
Science, May 1

Comparing 30,000 years of human history, researchers found that surviving famine, war or climate change helps groups recover more quickly from future shocks.

Swimming Beneath Sand, It’s ‘the Hardest of All Animals to Find’
Science, May 1

Indigenous rangers in Australia’s Western Desert got a rare close-up with the northern marsupial mole, which is tiny, light-colored and blind, and almost never comes to the surface.

Killer Asteroid Hunters Spot 27,500 Overlooked Space Rocks
Science, April 30

With the help of Google Cloud, scientists churned through hundreds of thousands of images of the night sky to reveal that the solar system is filled with unseen objects.

Edward Dwight Aims for Space at Last
Science, April 30

Six decades ago, Mr. Dwight’s shot at becoming the first Black astronaut in space was thwarted by racism and politics. Now, at 90, he’s finally going up.

From Baby Talk to Baby A.I.
Science, April 30

Could a better understanding of how infants acquire language help us build smarter A.I. models?

Honeybees Invaded My House, and No One Would Help
Science, April 30

Responding to fears of a “honeybee collapse,” 30 states have passed laws to protect the pollinators. But when they invaded my house, I learned that the honeybees didn’t need saving.

Even as He Faces Prison Time, Binance’s Founder Plans a Comeback
Business, April 30

Since pleading guilty to violating money-laundering rules, Changpeng Zhao, who ran the giant crypto exchange Binance, has networked across the United States to set up his next act.

They Shoot Owls in California, Don’t They?
Science, April 29

An audacious federal plan to protect the spotted owl would eradicate hundreds of thousands of barred owls in the coming years.

Ancient Female Ballplayer Makes Public Debut
Science, April 26

The statue will be part of “Ancient Huasteca Women: Goddesses, Warriors and Governors” at the National Museum of Mexican Art in Chicago.

Beth Linker Is Turning Good Posture on Its Head
Science, April 26

A historian and sociologist of science re-examines the “posture panic” of the last century. You’ll want to sit down for this.

A Megaraptor Emerges From Footprint Fossils
Science, April 24

A series of foot tracks in southeastern China points to the discovery of a giant velociraptor relative, paleontologists suggest in a new study.

Un poquito de tierra es bueno para tu salud
En español, April 24

Coge un puñado de tierra o haz senderismo en un camino enlodado: puede beneficiarte en mucho, desde tu ánimo hasta tu microbioma.

Cicadas Are Emerging Now. How Do They Know When to Come Out?
Science, April 24

Scientists are making computer models to better understand how the mysterious insects emerge collectively after more than a decade underground.

In Coral Fossils, Searching for the First Glow of Bioluminescence
Science, April 23

A new study resets the timing for the emergence of bioluminescence back to millions of years earlier than previously thought.

Yellowstone’s Wolves: A Debate Over Their Role in the Park’s Ecosystem
Science, April 23

New research questions the long-held theory that reintroduction of such a predator caused a trophic cascade, spawning renewal of vegetation and spurring biodiversity.

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.