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Why Opening Windows Is a Key to Reopening Schools
Interactive, Yesterday

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.

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Coronavirus Vaccine Tracker
Interactive, June 10

A look at all the vaccines that have reached trials in humans.

The Secret Life of a Coronavirus
Op Ed, Yesterday

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.

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Hunting for a Giant Black Hole, Astronomers Found a Nest of Darkness
Science, Yesterday

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.

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5 Picture Books About the Wonders of Science
Book Review, Yesterday

Fossils, flowers, galaxies and a rare “lefty” snail.

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The Outsized Influence of Teen T. Rex and Other Young Dinosaurs
Science, February 25

A deep dive into dinosaur data suggests that teenage T. rexes and other juvenile carnivores shaped their ecosystems.

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Manatees May Carry Half a Million Microscopic Hitchhikers
Science, February 25

Unexpected species of nematodes, some of them new to science, were found living on the skin of the marine mammals.

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For Shielding Endangered Neighbors, Pandas Make Flimsy Umbrellas
Science, February 25

A new study challenges a common hypothesis about how protecting charismatic species also conserves animals that are less well known.

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NASA Sent a Secret Message to Mars. Meet the People Who Decoded It.
Science, February 24

Engineers hinted they had hidden a code in the parachute that landed the Perseverance rover. Within hours, puzzle enthusiasts cracked it.

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Transplant Patient Dies After Receiving Lungs Infected With Coronavirus
Express, February 24

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.

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Can This New Map Fix Our Distorted Views of the World?
Science, February 24

You’re going to need some double-sided tape.

Merlin 183830595 b047c88f 6d82 4168 a692 4da172b2d68c mediumthreebytwo378
New analyses show Johnson & Johnson’s one-dose vaccine works well.
Science, February 24

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.

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New analyses show Johnson & Johnson’s one-dose vaccine works well.
Science, February 24

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.

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For Some Teens, It’s Been a Year of Anxiety and Trips to the E.R.
Science, February 23

During the pandemic, suicidal thinking is up. And families find that hospitals can’t handle adolescents in crisis.

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NASA’s Mars Landing, All the Way Down
Video, February 22

NASA released video from cameras aboard the Perseverance mission as it landed on the surface of Mars.

Watch Video From NASA’s Perseverance Rover Landing on Mars
Science, February 22

The spacecraft has sent pictures, audio and video recordings to Earth since it landed on Mars last Thursday.

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Europe Wants to Diversify Its Pool of Astronauts
Foreign, February 22

In its first hiring drive in over a decade, the continent’s space agency is looking to recruit disabled people and more women.

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She Beat Cancer at 10. Now She’s Set to Be the Youngest American in Space.
Science, February 22

St. Jude Hospital and Jared Isaacman, a billionaire entrepreneur, selected Hayley Arceneaux for a trip to orbit in a SpaceX capsule.

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Hello? Is There Anybody Out There?
Letters, February 21

Readers respond to a column by Farhad Manjoo about looking for intelligent life in the universe.

Seven Hundred Leagues Beneath Titan’s Methane Seas
Science, February 21

Mars, Shmars; this voyager is looking forward to a submarine ride under the icebergs on Saturn’s strange moon.

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Could This Be the Lab-Made Dinner Party of Our Future?
Sunday Business, February 21

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.

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Octopuses Have a Secret Sense to Keep Their 8 Arms Out of Trouble
Science, February 20

Even when an octopus can’t see light with its eyes, its arms seem to know it is there.

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It’s Been a Busy Month on Mars
Interactive, February 19

When NASA’s Perseverance rover landed on the red planet on Thursday, it was the end of a bustling cycle of activity.

Perseverance’s Pictures From Mars Show NASA Rover’s New Home
Science, February 19

Scientists working on the mission are eagerly scrutinizing the first images sent back to Earth by the robotic explorer.

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‘I Am Worth It’: Why Thousands of Doctors in America Can’t Get a Job
Science, February 19

Medical schools are producing more graduates, but residency programs haven’t kept up, leaving thousands of young doctors “chronically unmatched” and deep in debt.

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NASA’s Perseverance Rover Lands on Mars to Renew Search for Extinct Life
Science, February 18

Perseverance’s arrival extends the successful U.S. landing record on the planet, and brings sophisticated tools to the hunt for alien life.

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Marte, un planeta gélido e inhóspito, es ideal para buscar los rastros de la vida primigenia
en Español, February 18

Nuestros primeros días en la Tierra han desaparecido casi por completo, pero en Marte, el pasado está enterrado.

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NASA Lands Perseverance on Mars
Video, February 18

NASA successfully landed its new robotic rover on Mars Thursday, a mission to directly study if there was ever life on the planet.

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Even more missions to Mars in the decade ahead.
Science, February 18

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Bruce Blackburn, Designer of Ubiquitous NASA Logo, Dies at 82
Obits, February 18

He was known for the NASA “worm,” which has become synonymous with space exploration. He also designed the 1976 American Revolution Bicentennial star.

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What else will NASA do in 2021?
Science, February 18

What other spacecraft are currently studying Mars?
Science, February 18

Will China be next to land on Mars?
Science, February 18

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The U.A.E. orbiter sent back its first picture of Mars.
Science, February 18

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A Hitchhiker’s Guide to an Ancient Geomagnetic Disruption
Science, February 18

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.

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A Famous Black Hole Gets a Massive Update
Science, February 18

Cygnus X-1, one of the first identified black holes, is much weightier than expected, raising new questions about how such objects form.

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What will happen during the landing attempt?
Science, February 18

When is the landing and how can I follow it?
Science, February 18

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What are the chances that this will work?
Science, February 18

18mars landing live1 mediumthreebytwo210
Why is landing on Mars so difficult?
Science, February 18

What about the ‘Marscopter’?
Science, February 18

What will the rover do on Mars?
Science, February 18

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How will NASA and Europe bring rocks from Mars to Earth?
Science, February 18

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Meet Elizabeth Ann, the First Cloned Black-Footed Ferret
Science, February 18

Her birth represents the first cloning of an endangered species native to North America, and may bring needed genetic diversity to the species.

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Meet the Newest Member of the Fluorescent Mammal Club
Science, February 18

The springhare — whose coat glows a patchy pinkish-orange under UV light — joins the platypus and other mammals with this perplexing trait.

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NASA’s Mars Rover Landing: When to Watch
Science, February 18

The Perseverance rover will attempt to touch down in one piece on Thursday. Here’s what you need to know.

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NASA Will Listen for Thumps From Its Rover’s Arrival on Mars
Science, February 17

Parts of the new visitor will make large impacts that could be picked up by the InSight spacecraft’s seismometer.

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Leo Goodman, Who Transformed Sociology With Stats, Dies at 92
Obits, February 17

He developed tools for researchers to analyze categorical data, revolutionizing the study of poverty, income inequality and social mobility. He died of Covid-19.

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The Biden administration pledges a nearly $200 million “down payment” for tracking virus variants, as lawmakers push for billions.
Science, February 17

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Million-Year-Old DNA Rewrites the Mammoth Family Tree
Science, February 17

Genomic data — the oldest ever recovered from a fossil — reveals the origin and evolution of the Columbian mammoth.

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Why Frigid Mars Is the Perfect Place to Look for Ancient Life
Op Ed, February 17

Our early days on Earth have almost entirely disappeared, but on Mars, the past is entombed.

Merlin 54330177 ba9d0005 2033 41fd b3ce e9eb33392165 mediumthreebytwo378
Wisconsin Official Traded Sturgeon Research Eggs for Caviar, Prosecutors Say
Express, February 17

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.

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Potential for New Coronaviruses May Be Greater Than Known
Science, February 16

Researchers calculated the likelihood of different viruses recombining in the same animal to make new disease-causing pathogens.

Merlin 144381195 afc81c81 6721 4fe7 beab 1c08a72f5c71 mediumthreebytwo378
Meet America’s 63rd National Park
Travel, February 16

The New River Gorge in West Virginia got the federal government’s highest protection, thanks, in part, to the latest pandemic relief bill.

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‘Right Now Feels So Long and Without Any End in Sight’
Science, February 15

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.

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Norman Golb, Dead Sea Scrolls Contrarian, Is Dead at 92
Obits, February 15

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.

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Where Did the Dinosaur-Killing Impactor Come From?
Science, February 15

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.

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7 Virus Variants Found in U.S. Carrying the Same Mutation
Science, February 14

Scientists don’t know yet whether the mutation makes the variants more contagious, but they are concerned that it might.

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Mature Red-Bellied Lemur Seeks Soul Mate for Cuddles and Grooming
Science, February 14

At the Duke Lemur Center, an innovative plan to keep the animals social late in life: pair them with lemurs of another species.

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Isadore Singer, Who Bridged a Gulf From Math to Physics, Dies at 96
Obits, February 12

His unifying disparate theoretical realms helped revolutionize our understanding of the most basic structure of the universe.

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Was Stonehenge a ‘Secondhand’ Monument?
Science, February 12

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.

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Earth to Voyager 2: After a Year in the Darkness, We Can Talk to You Again
Science, February 12

NASA’s sole means of sending commands to the distant space probe, launched 44 years ago, is being restored on Friday.

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Cannibalism May Be Key for These Cockroach Couples
Science, February 12

Males and females of a species that mates monogamously complete their bond by gnawing off each other’s wings, a new study found.

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Millie Hughes-Fulford, NASA Shuttle Scientist, Dies at 75
Obits, February 11

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.

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Tiny Blobs of Brain Cells Could Reveal How Your Mind Differs From a Neanderthal’s
Science, February 11

Researchers grew clusters of brain cells in the lab with a gene carried by our ancient ancestors.

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Whale Songs Could Reveal Deep Secrets Beneath the Oceans
Science, February 11

The aquatic mammals’ sound waves penetrate into the rocks under the waves, which could assist seismologists’ surveys.

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Aliens Must Be Out There
Op Ed, February 11

Why aren’t we looking for them?

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Monolith in Turkey Is Revealed to Be Government Stunt
Express, February 10

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.

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Can These Hedge Trimmers With Fins Avoid a Brush With Extinction?
Science, February 10

Scientists have found that sawfish are thriving in some habitats while vanishing from others.

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Hear the Sound of a Seashell Horn Found in an Ancient French Cave
Science, February 10

Music from the large conch probably hadn’t been heard by human ears for 17,000 years.

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Running Is a Total Body Affair
Well, February 10

We can thank our heads and shoulders — and not just our knees and toes — that we evolved to run as well as we do.

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China’s Mars Mission Begins Orbit of the Red Planet
Science, February 10

The Tianwen-1 mission is the second of three new visitors to Mars this month.

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Arianna Rosenbluth Dies at 93; Pioneering Figure in Data Science
Obits, February 9

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.

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Mars Mission From the U.A.E. Prepares to Orbit Red Planet
Science, February 9

The Hope spacecraft will fire its engines on Tuesday, aiming to be grappled by the planet’s gravity and begin its atmospheric science studies.

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Mars Mission From the U.A.E. Begins Orbit of Red Planet
Science, February 9

The Hope spacecraft fired its engines on Tuesday and was grappled by the planet’s gravity to begin its atmospheric science studies.

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Life on Venus? The Picture Gets Cloudier
Science, February 8

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.

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Electrons, Photons, Gluons, Quarks: A Nobel-Winning Physicist Explains It All
Book Review, February 8

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.

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Einsteinium Is Mysterious. Scientists Have Unlocked Some of Its Secrets.
Science, February 7

Number 99 on the periodic table does not occur naturally and is difficult to make and store, challenging researchers who want to study it.

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Emil Freireich, Groundbreaking Cancer Researcher, Dies at 93
Obits, February 7

He helped devise a successful chemotherapy regimen for childhood leukemia, which had long been a death sentence.

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Abraham Twerski, Who Merged 12 Steps and the Torah, Dies at 90
Obits, February 6

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.”

Watch This Billion-Year Journey of Earth’s Tectonic Plates
Science, February 6

A new simulation offers a different view of how the continents we live on drifted into their current configuration.

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A Natural Work of Art May Be Hiding Among Indian Cave Masterpieces
Science, February 5

What may be an overlooked fossil in a well-known cultural site could offer clues to the age of its underlying rocks.

New blue 1 mediumthreebytwo378
It’s Not Every Day We Get a New Blue
Styles, February 5

In 2009, a professor discovered a novel hue by accident in his university lab. Now, you can paint with it

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The Coronavirus Is a Master of Mixing Its Genome, Worrying Scientists
Science, February 5

New studies underscore how coronaviruses frequently mix their genetic components — which could contribute to the rise of dangerous variants.

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Darwin’s Dim View of the Second Sex
Book Review, February 5

The father of evolutionary theory held women to be intellectually inferior to men, with one notable exception. Michael Sims explains.

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Goats Don’t Vote
Science, February 5

While some animals that rove in groups appear to cast a form of ballot about directions, goats mostly copy each other.

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The F.D.A. prepares plan if vaccines prove less effective against new variants.
Science, February 4

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Paul Crutzen, Nobel Laureate Who Fought Climate Change, Dies at 87
Obits, February 4

He named our age the “Anthropocene” and warned the world of threats that certain chemicals posed to the ozone layer.

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In the Oceans, the Volume Is Rising as Never Before
Science, February 4

A new review of the scientific literature confirms that anthropogenic noise is becoming unbearable for undersea life.

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The Mouse That Survived a Volcanic Apocalypse
Science, February 4

Much as small mammals outlived the dinosaur extinction, this rodent beat the odds when Pinatubo blew its top in the Philippines in 1991.

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A Parallel Pandemic Hits Health Care Workers: Trauma and Exhaustion
Science, February 4

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?

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Jeff Bezos Renews Focus on Blue Origin, Which Has Been Slower to Launch
Science, February 3

The Amazon founder started his private rocket company in 2000, but its busiest phase could just now be starting.

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Archaeologists Find Mummies With Golden Tongues
Express, February 3

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.

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These Lizards Have a Hot Trick to Escape Hungry Snakes
Science, February 3

On some Japanese islands where lizards live, the ones that fear predators have higher body temperatures that help them run faster.

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A Mysterious, Lethal Chimp Disease Is Linked to a Human Illness
Science, February 3

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.

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SpaceX’s Starship Crashes Again During Prototype Launch
Video, February 2

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.

Merlin 183141411 5a0caed4 aed4 4859 9724 bf4b5255587f mediumthreebytwo378
SpaceX’s Prototype Mars Rocket Crashes in Test Flight
Science, February 2

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.

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The Webb Telescope, NASA’s Golden Surfer, Is Almost Ready, Again
Science, February 2

After decades of fits and starts, the multibillion dollar successor to the Hubble telescope is expected to launch as soon as this fall.

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The Skin-Deep Physics of Sidewinder Snakes
Science, February 1

A close-up on snake skin helped scientists work out what might help certain snakes navigate sandy surfaces.

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To Get on This SpaceX Flight, You Don’t Have to Be Rich, Just Lucky
Science, February 1

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.

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Andrew Brooks, Who Developed a Coronavirus Spit Test, Dies at 51
Obits, January 31

His breakthrough helped millions get their results quickly in the early days of the pandemic, when tests were scarce and lines were long.

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This Ammonite Was Fossilized Outside Its Shell
Science, January 31

The bizarre fossil is one of very few records of soft tissue in a creature better known as a whorled shell.

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Joseph Sonnabend, Early Force in Fight Against AIDS, Dies at 88
Obits, January 30

At the epicenter of the epidemic in New York City, he was a pioneer researcher who, as a clinician, also made house calls.

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They Put the Bite in Trilobite
Science, January 30

New research helps explain how some ancient species hunted and fed, and highlights the shell-crushing power of one large trilobite.

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How an Eight-Sided ‘Egg’ Ended Up in a Robin’s Nest
Science, January 29

An experiment by evolutionary biologists offers new insights into birds’ brains.

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Sync your calendar with the solar system
Interactive, January 3

Never miss an eclipse, a meteor shower, a rocket launch or any other astronomical and space event that's out of this world.

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How the Novavax Vaccine Works
Interactive, December 30

Using a coronavirus protein to train the immune system.

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The Year in Spaceflight
Interactive, December 28

It started with a literal bang.

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Which Animal Best Embodies 2020?
Interactive, December 23

It was a rough year for Homo sapiens.

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How Chuck Yeager’s ‘Right Stuff’ Hit the Screen
Interactive, December 8

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.

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Coronavirus Vaccine Tracker
Interactive, December 8

A look at all the vaccines that have reached trials in humans.

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How Moderna’s Vaccine Works
Interactive, December 5

Two shots can prime the immune system to fight the coronavirus.

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How Pfizer’s Vaccine Works
Interactive, December 5

Two shots can prime the immune system to fight the coronavirus.

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The Social Life of Forests
Interactive, December 2

Trees appear to communicate and cooperate through subterranean networks of fungi. What are they sharing with one another?

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Designed to Deceive: Do These People Look Real to You?
Interactive, November 21

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.

Les masques, ça marche. Vraiment. On va vous montrer comment.
Interactive, November 11

Un voyage virtuel à travers le monde microscopique du coronavirus nous montre comment les masques sont un moyen de défense important contre sa transmission.

Las mascarillas funcionan. En serio. Te mostraremos cómo
Interactive, November 2

Un viaje visual a través del mundo microscópico del coronavirus demuestra el modo en que las mascarillas son una importante defensa contra la transmisión.

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20 Years Aboard the International Space Station
Interactive, November 2

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.

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5 Strange Facts About Quokkas
Interactive, October 23

They are curious, bold and known for their adorable grins. They follow tourists around and even “pose” for photos.

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Can You Spot One of These Migrating Birds?
Interactive, October 7

More than 500 bird species in North America migrate in the fall, so it’s a great time to whip out the binoculars.

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What’s Behind Those Colorful Leaves?
Interactive, September 25

It may seem like magic, but each leaf’s new look comes from chemical changes happening within.

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Exploring the Solar System
Interactive, July 27

A guide to the spacecraft beyond Earth’s orbit.

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Meet the 3 Spacecraft Heading to Mars This Summer
Interactive, July 26

Three missions are headed to Mars this summer. They carry a wide array of instruments to explore the red planet.

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Tratamientos y medicamentos para el coronavirus: monitoreo de efectividad
Interactive, July 16

Una lista actualizada de tratamientos potenciales para la COVID-19.

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SpaceX Postpones Launch of Two NASA Astronauts
Interactive, May 26

The Crew Dragon launch is now scheduled for Saturday at 3:22 p.m. Eastern time.

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Following Comet SWAN
Interactive, May 12

A newly discovered comet is swinging around the sun.

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Así muta y se propaga el coronavirus
Interactive, April 30

El virus ha mutado. Pero eso no significa que se esté volviendo más mortal.

Cough image still promo facebookjumbo v2
This 3-D Simulation Shows Why Social Distancing Is So Important
Interactive, April 14

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.

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Apollo 13: As They Shot It
Interactive, April 13

Surviving disaster, in the astronauts’ words and photographs.

Coronavirus genome bad news wrapped in protein promo 1585854591732 mediumthreebytwo378
Bad News Wrapped in Protein: Inside the Coronavirus Genome
Interactive, April 3

The virus injects a tiny but remarkably complex strand of RNA into infected cells.

How coronavirus infects a cell promo 1583866148761 mediumthreebytwo210 v3
Así secuestra tus células el coronavirus
Interactive, March 13

El intrincado viaje que sigue en el cuerpo el virus que causa COVID-19.

How coronavirus infects a cell promo 1583866148761 mediumthreebytwo210 v3
Así secuestra tus células el coronavirus
Interactive, March 13

El intrincado viaje que sigue en el cuerpo el virus que causa COVID-19.

How coronavirus infects a cell promo 1583866148761 mediumthreebytwo378 v3
How Coronavirus Hijacks Your Cells
Interactive, March 11

The intricate journey of the virus that causes Covid-19.