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In Vienna and Beijing, the First Nuclear Clocks Begin to Tick

DAN GARISTO

By measuring the squishing and unsquishing of thorium-229 nuclei, two teams created a new type of clock that could someday beat the precision of atomic clocks.

The Atlantic hurricane season has been eerily quiet—Tropical Storm Isaias could change that

Tropical Storm Isaias is expected to become a hurricane by Thursday, meteorologists say

Scientists unlock the longevity secrets of 194-year-old Jonathan the giant tortoise

The secret to Jonathan the tortoise's extreme longevity may be in keeping genes tidy

A suspected case of pneumonic plague is raising fears of an outbreak. Should you be worried?

Russian authorities reported earlier this week that an employee at a lab in Siberia that studies plague and other infectious diseases had died of pneumonia of "unknown" cause

A Public Health-Minded Senator Asks: What Comes After Trump and Kennedy?

SHERYL GAY STOLBERG

Senator Patty Murray, a former chair of the Senate health committee, is forming a group of experts to examine how to insulate the C.D.C. from political interference.

Jonathan the Giant Tortoise Is 194 Years Old. He Just Had His Genome Sequenced.

MONIQUE BROUILLETTE

Scientists have sequenced his genome for the first time, hoping the world’s oldest land animal can offer clues into the genetics of longevity.

What Experts Want to Know About the Russia Plague Scare

K. R. CALLAWAY

Missing details about the death of a lab worker, including the cause, are worrying scientists.

Margaret Hamilton, Whose Software Guided the Apollo Missions, Has Died

TRIP GABRIEL

Margaret Hamilton, the first female programmer hired to work on the space project at M.I.T., was 90.

Was the Human Gut Healthier in Ancient Times?

CARL ZIMMER

The microbiome isn’t what it used to be in many parts of the world. The shift may be affecting the well-being of people in industrialized countries.

The ‘Kelvin wave’ hitting California is a potent warning about sea-level rise

Sea level on the California coast is likely to be pushed to extremes this winter by compounding forces, but these extremes could be the norm by the end of the century

Mathematicians invented a knitting stitch that stops mistakes from spreading

With a little help from knot theory, scientists have invented a "robust knit" to fight laddering

Hurricane Isaias just set a new record for Atlantic storms

Isaias just became the latest-forming first hurricane of the Atlantic storm season since reliable records began, meteorologists say

Artemis II images boost NASA’s moon base plans

The first crewed lunar mission in more than a half-century brought back more than 800 gigabytes of data on colorful craters, flashing meteoroids, and much more

Before Computer Science Became a Boys’ Club, Margaret Hamilton Wrote the Code

CAROLYN Y. JOHNSON AND KENNETH CHANG

The woman who helped put astronauts on the moon was a software engineer when the field was not prestigious or lucrative.

As Flood Risk Increases in Himalayas, Nepal Builds More in Vulnerable Areas

RAYMOND ZHONG

The total footprint of buildings along flood-prone riverbanks in the Himalayas grew by half in recent years, a study found.