A simulation of airflow in a real New York City classroom shows the risks of coronavirus infection and how simple ventilation and filtration can reduce the probability of exposure.
A look at all the vaccines that have reached trials in humans.
An oily, 100-nanometer-wide bubble of genes has killed more than two million people and reshaped the world. Scientists don’t quite know what to make of it.
No Gargantua dwells at the heart of stellar cluster NGC 6397. Instead, a few dozen smaller black holes seem to be swarming around in there, throwing their considerable masses around.
Fossils, flowers, galaxies and a rare “lefty” snail.
A deep dive into dinosaur data suggests that teenage T. rexes and other juvenile carnivores shaped their ecosystems.
Unexpected species of nematodes, some of them new to science, were found living on the skin of the marine mammals.
A new study challenges a common hypothesis about how protecting charismatic species also conserves animals that are less well known.
Engineers hinted they had hidden a code in the parachute that landed the Perseverance rover. Within hours, puzzle enthusiasts cracked it.
In what appears to be the first case of its kind, a pair of donated lungs led to Covid-19 in an organ recipient, according to doctors at the University of Michigan.
You’re going to need some double-sided tape.
F.D.A. studies show the shot strongly protects against severe illness and may reduce spread of the virus. But the drugmaker has fallen short of initial production goals.
F.D.A. studies show the shot strongly protects against severe illness and may reduce spread of the virus. But the drugmaker has fallen short of initial production goals.
During the pandemic, suicidal thinking is up. And families find that hospitals can’t handle adolescents in crisis.
NASA released video from cameras aboard the Perseverance mission as it landed on the surface of Mars.
The spacecraft has sent pictures, audio and video recordings to Earth since it landed on Mars last Thursday.
In its first hiring drive in over a decade, the continent’s space agency is looking to recruit disabled people and more women.
St. Jude Hospital and Jared Isaacman, a billionaire entrepreneur, selected Hayley Arceneaux for a trip to orbit in a SpaceX capsule.
Readers respond to a column by Farhad Manjoo about looking for intelligent life in the universe.
Mars, Shmars; this voyager is looking forward to a submarine ride under the icebergs on Saturn’s strange moon.
A slew of start-ups are engineering faux meats, eggs and dairy products that conjure a time when we move from farm-to-table to lab-to-table.
Even when an octopus can’t see light with its eyes, its arms seem to know it is there.
When NASA’s Perseverance rover landed on the red planet on Thursday, it was the end of a bustling cycle of activity.
Scientists working on the mission are eagerly scrutinizing the first images sent back to Earth by the robotic explorer.
Medical schools are producing more graduates, but residency programs haven’t kept up, leaving thousands of young doctors “chronically unmatched” and deep in debt.
Perseverance’s arrival extends the successful U.S. landing record on the planet, and brings sophisticated tools to the hunt for alien life.
Nuestros primeros días en la Tierra han desaparecido casi por completo, pero en Marte, el pasado está enterrado.
NASA successfully landed its new robotic rover on Mars Thursday, a mission to directly study if there was ever life on the planet.
He was known for the NASA “worm,” which has become synonymous with space exploration. He also designed the 1976 American Revolution Bicentennial star.
A shift in Earth’s poles 42,000 years ago may have drastically altered the planet’s climate, scientists have found — and they’re naming the period after the author Douglas Adams.
Cygnus X-1, one of the first identified black holes, is much weightier than expected, raising new questions about how such objects form.
Her birth represents the first cloning of an endangered species native to North America, and may bring needed genetic diversity to the species.
The springhare — whose coat glows a patchy pinkish-orange under UV light — joins the platypus and other mammals with this perplexing trait.
The Perseverance rover will attempt to touch down in one piece on Thursday. Here’s what you need to know.
Parts of the new visitor will make large impacts that could be picked up by the InSight spacecraft’s seismometer.
He developed tools for researchers to analyze categorical data, revolutionizing the study of poverty, income inequality and social mobility. He died of Covid-19.
Genomic data — the oldest ever recovered from a fossil — reveals the origin and evolution of the Columbian mammoth.
Our early days on Earth have almost entirely disappeared, but on Mars, the past is entombed.
Ryan Koenigs, a biologist who oversees the state’s sturgeon spearing season in Lake Winnebago, is accused of accepting $20,000 worth of caviar in an illegal bartering scheme.
Researchers calculated the likelihood of different viruses recombining in the same animal to make new disease-causing pathogens.
The New River Gorge in West Virginia got the federal government’s highest protection, thanks, in part, to the latest pandemic relief bill.
More than 700 people have been keeping digital diaries as part of Pandemic Journaling Project. It may be the most complete record of our shifting moods in this isolating year.
He challenged the conventional wisdom about a major archaeological discovery. He also led a successful effort to open it for study by a wide range of researchers.
A new study blames a comet fragment for the death of the dinosaurs 66 million years ago. But most experts maintain that an asteroid caused this cataclysmic event.
Scientists don’t know yet whether the mutation makes the variants more contagious, but they are concerned that it might.
At the Duke Lemur Center, an innovative plan to keep the animals social late in life: pair them with lemurs of another species.
His unifying disparate theoretical realms helped revolutionize our understanding of the most basic structure of the universe.
The Neolithic site appears to have begun as a monument in Wales that was dismantled and carried 175 miles east as part of a larger migration, a new study suggests.
NASA’s sole means of sending commands to the distant space probe, launched 44 years ago, is being restored on Friday.
Males and females of a species that mates monogamously complete their bond by gnawing off each other’s wings, a new study found.
As the space agency’s first female payload specialist, she conducted experiments about the impact of weightlessness on astronauts’ immune systems and loss of bone mass.
Researchers grew clusters of brain cells in the lab with a gene carried by our ancient ancestors.
The aquatic mammals’ sound waves penetrate into the rocks under the waves, which could assist seismologists’ surveys.
The inscription on the monolith read “Look at the sky, see the moon.” President Recep Tayyip Erdogan used the same slogan in announcing Turkey’s new space program this week.
Scientists have found that sawfish are thriving in some habitats while vanishing from others.
Music from the large conch probably hadn’t been heard by human ears for 17,000 years.
We can thank our heads and shoulders — and not just our knees and toes — that we evolved to run as well as we do.
The Tianwen-1 mission is the second of three new visitors to Mars this month.
Dr. Rosenbluth, who received her physics Ph.D. at 21, helped create an algorithm that has became a foundation of understanding huge quantities of data. She died of complications of the coronavirus.
The Hope spacecraft will fire its engines on Tuesday, aiming to be grappled by the planet’s gravity and begin its atmospheric science studies.
The Hope spacecraft fired its engines on Tuesday and was grappled by the planet’s gravity to begin its atmospheric science studies.
Despite doubts from many scientists, a team of researchers who said they had detected an unusual gas in the planet’s atmosphere were still confident of their findings.
In “Fundamentals,” Frank Wilczek describes his own love for physics and details what we all need to understand about the forces that shape our physical world.
Number 99 on the periodic table does not occur naturally and is difficult to make and store, challenging researchers who want to study it.
He helped devise a successful chemotherapy regimen for childhood leukemia, which had long been a death sentence.
A noted psychiatrist, he looked outside his Orthodox tradition to meld an eclectic menu of addiction treatments, including the A.A. idea of a “higher power.”
A new simulation offers a different view of how the continents we live on drifted into their current configuration.
What may be an overlooked fossil in a well-known cultural site could offer clues to the age of its underlying rocks.
In 2009, a professor discovered a novel hue by accident in his university lab. Now, you can paint with it
New studies underscore how coronaviruses frequently mix their genetic components — which could contribute to the rise of dangerous variants.
The father of evolutionary theory held women to be intellectually inferior to men, with one notable exception. Michael Sims explains.
While some animals that rove in groups appear to cast a form of ballot about directions, goats mostly copy each other.
He named our age the “Anthropocene” and warned the world of threats that certain chemicals posed to the ozone layer.
A new review of the scientific literature confirms that anthropogenic noise is becoming unbearable for undersea life.
Much as small mammals outlived the dinosaur extinction, this rodent beat the odds when Pinatubo blew its top in the Philippines in 1991.
Vaccines may be on the way, but many on the front-lines are burned out. Has the government done enough to help alleviate their stress?
The Amazon founder started his private rocket company in 2000, but its busiest phase could just now be starting.
The tongues, found at a temple on the outskirts of Alexandria, Egypt, were probably meant to help the deceased speak in the afterlife, experts said.
On some Japanese islands where lizards live, the ones that fear predators have higher body temperatures that help them run faster.
Deaths at a Sierra Leone sanctuary that stumped people for 15 years have now been linked to a bacterium that seems to cause similar ailments in humans.
A test flight of SpaceX’s Starship, Elon Musk’s next-generation spacecraft which is intended to one day land on Mars, was launched on Tuesday for a brief flight, but came to an explosive end.
After defying the F.A.A. during its last test flight in December, the company got approval but didn’t succeed in sticking the landing.
After decades of fits and starts, the multibillion dollar successor to the Hubble telescope is expected to launch as soon as this fall.
A close-up on snake skin helped scientists work out what might help certain snakes navigate sandy surfaces.
Jared Isaacman, 37-year-old founder of Shift4 Payments, is chartering a trip to orbit and raffling a seat to a random winner to raise money for childhood cancer research.
His breakthrough helped millions get their results quickly in the early days of the pandemic, when tests were scarce and lines were long.
The bizarre fossil is one of very few records of soft tissue in a creature better known as a whorled shell.
At the epicenter of the epidemic in New York City, he was a pioneer researcher who, as a clinician, also made house calls.
New research helps explain how some ancient species hunted and fed, and highlights the shell-crushing power of one large trilobite.
An experiment by evolutionary biologists offers new insights into birds’ brains.
Never miss an eclipse, a meteor shower, a rocket launch or any other astronomical and space event that's out of this world.
Using a coronavirus protein to train the immune system.
The test pilot, who died Monday at 97, inspired generations after he was featured in the book and film “The Right Stuff.” Here’s how it came about.
A look at all the vaccines that have reached trials in humans.
Two shots can prime the immune system to fight the coronavirus.
Two shots can prime the immune system to fight the coronavirus.
Trees appear to communicate and cooperate through subterranean networks of fungi. What are they sharing with one another?
The people in this story may look familiar, like ones you’ve seen on Facebook or Twitter or Tinder. But they don’t exist. They were born from the mind of a computer, and the technology behind them is improving at a startling pace.
Un voyage virtuel à travers le monde microscopique du coronavirus nous montre comment les masques sont un moyen de défense important contre sa transmission.
Un viaje visual a través del mundo microscópico del coronavirus demuestra el modo en que las mascarillas son una importante defensa contra la transmisión.
Twenty years ago today, three astronauts stepped aboard the International Space Station. Since then, the I.S.S. has hosted hundreds of residents from many countries. This is a history of our first 20 years of living aboard.
They are curious, bold and known for their adorable grins. They follow tourists around and even “pose” for photos.
More than 500 bird species in North America migrate in the fall, so it’s a great time to whip out the binoculars.
It may seem like magic, but each leaf’s new look comes from chemical changes happening within.
Three missions are headed to Mars this summer. They carry a wide array of instruments to explore the red planet.
Una lista actualizada de tratamientos potenciales para la COVID-19.
The Crew Dragon launch is now scheduled for Saturday at 3:22 p.m. Eastern time.
El virus ha mutado. Pero eso no significa que se esté volviendo más mortal.
We visualized a cough to show how far respiratory droplets can spread. If you haven’t been keeping your distance to fight the coronavirus, this may persuade you.
Surviving disaster, in the astronauts’ words and photographs.
The virus injects a tiny but remarkably complex strand of RNA into infected cells.
El intrincado viaje que sigue en el cuerpo el virus que causa COVID-19.
El intrincado viaje que sigue en el cuerpo el virus que causa COVID-19.
The intricate journey of the virus that causes Covid-19.
