NASA Moves Toward Boeing Starliner Return to Restore Space Station Traffic

With the Falcon 9 rocket set to fly again, and testing of the Starliner capsule progressing, the agency is seeking to turn the page on a brief, troubled chapter in orbit.

AlphaProof, a New A.I. from Google DeepMind, Scores Big at the International Math Olympiad

A.I. is getting good at math ? and might soon make a worthy collaborator for humans.

The Chimps Who Learned to Say ?Mama?

Old recordings show captive chimps uttering the word, which some scientists believe may offer clues to the origins of human speech.

NASA?s Perseverance Rover Finds Hints of Potential Ancient Life on Mars Rock

The rock, studied by NASA?s Perseverance rover, has been closely analyzed by scientists on Earth who say that nonmicrobial processes could also explain its features.

Championship Snail Racing at 0.006 M.P.H.

Last one to the finish line is a miserable slug.

The Moon?s Most Shadowy Places Can?t Hide From NASA?s New Camera

ShadowCam, a NASA instrument aboard a South Korean spacecraft, is taking pictures of the moon where the sun doesn?t shine.

Fossil Hints That Jurassic Mammals Lived Slow and Died Old

Scientists found an unexpected aging pattern in a mostly intact juvenile mammal skeleton from the paleontological period.

Not Afraid of Sharks? Well, Now They?re on Cocaine.

Researchers have confirmed the presence of cocaine in sharks off the coast of Rio de Janeiro, though questions remain about the effects of the drug.

Reality Show Contestant Apologizes After Eating Protected Bird in New Zealand

A contestant on the reality show ?Race to Survive: New Zealand? killed and ate a weka during filming. The contestant, who said he was hungry, has apologized for ?disrespecting New Zealand.?

Jasper Fire Worsened by Pyrocumulonimbus Cloud

Blazes that generate such stormy conditions can be nearly impossible to put out and pose special dangers to firefighters.

Can Fees on Polluting Cars Clean the Air? London Has New Evidence.

The city?s expanded low-emissions zone, which was politically fraught, has cut emissions that contribute to health problems like asthma, new numbers show.

For Epidemics to Cross Oceans, Viruses on Ships Had to Beat the Odds

In the era when people traveled by sailing ship and steamer, illnesses usually burned themselves out before boats reached shore, a new study finds.

Rabies is Spreading in South African Seals, Scientists Say

The outbreak may be the first ever documented in marine mammals.

Western Wildfire Smoke Reaches the East Coast

Wildfire smoke from the Western United States and Canada is blowing across the Northeast, lowering air quality and endangering vulnerable populations.

The Taxidermy Bat Market Is Compounding Threats to a Species? Existence

Online sales appear to be compounding threats from climate change and habitat loss, according to new research.

Breast Cancer Survival Not Boosted by Double Mastectomy, Study Says

A large study showed that for most patients, having both breasts removed after cancer was detected in one made no difference.

Halting the Bird Flu Outbreak in Cows May Require Thinking Beyond Milk

A new study paints a complex picture of the outbreak, suggesting that the virus could be spreading in multiple ways and that it is not always mild in cows.

A Disease That Makes Children Age Rapidly Gets Closer to a Cure

Progress in the quest to help progeria patients suggests that gene editing techniques may help treat other ultrarare conditions.

Secrets Emerge From a Fossil?s Taco Shell-Like Cover

An examination of an aquatic, shrimplike creature that lived half a billion years ago offers insight into how arthropods with mandibles became so common.

E.P.A. Announces Climate Pollution Reduction Grants Totaling $4.3 Billion

States, tribes, local governments and territories sent in proposals aimed at cutting greenhouse gas emissions.

Thomas Neff, Who Turned Soviet Warheads Into Electricity, Dies at 80

An M.I.T. physicist, he engineered an East-West deal that reduced nuclear threats and produced one of the greatest peace dividends of all time.

Is Bird Flu Spreading Widely to Farm Workers? A Small Study Offers Some Reassurance

Officials found no evidence of silent infections in 35 Michigan dairy workers, but experts noted that much more data was necessary.

Some Seniors Readily Step Back. Some Never Will.

Researchers are only beginning to understand why some people embrace retirement while others won?t even consider it.

Copyright New York Times