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Less than a decade since the first detection of gravitational waves—ripples in spacetime itself—proposed budget cuts threaten to silence this groundbreaking science

When researchers discovered "dark oxygen" last year, the news spread around the world, but the biggest challenge to the science comes from its funders.

Researchers hoped CMB-S4, a $900-million cosmology experiment, would answer one of the greatest questions in physics. Instead it’s become another cautionary tale of pursuing big science amid shrinking budgets

High humidity and low overnight temperatures will put tens of millions of people under heat alerts over the course of the coming week

Physicists superheated gold to 14 times its melting point, disproving a long-standing prediction about the temperature limits of solids

As large language models like Claude 4 express uncertainty about whether they are conscious, researchers race to decode their inner workings, raising profound questions about machine awareness, ethics and the risks of uncontrolled AI evolution

A study of nearly 1,000 people showed that brain aging was not linked to infection status

Hundreds of staffers at the National Institutes of Health, Environmental Protection Agency, NASA and the National Science Foundation have signed public letters to leadership opposing the direction in which the agencies are headed

If you’re seeking a summer read, Scientific American has some fantastic fiction and notable nonfiction to recommend.

Ozzy Osbourne, lead singer of Black Sabbath, has died at age 76. He said he had been previously diagnosed with a form of Parkinson’s disease linked to the gene PRKN

The largest yet study on a four-day workweek included 141 companies, 90 percent of which retained the arrangement at the end of the six-month experiment

My lawsuit in Hawaii lays out the safety issues in OpenAI’s products and how they could irreparably harm both Hawaii and the rest of the U.S.

A declaration of dissent from past and present NASA employees warns that science and safety are at risk and joins similar documents from staff at other federal science agencies

A hormone-free pill, called YCT-529, that temporarily stops sperm production by blocking a vitamin A metabolite has just concluded its first safety trial in humans, getting a step closer to increasing male contraceptive options

Optimists have similar patterns of brain activation when they think about the future—but pessimists are all different from one another, a brain scan study suggests

In only its second year, the International Logic Olympiad is already booming as logic becomes more and more crucial in our ever changing world

Humid heat is blanketing the eastern U.S. this week, exacerbated by “corn sweat” in the Midwest

A SkyWest pilot’s last-second decision could have prevented a collision that air-traffic controllers may not have foreseen

Acknowledging the limits of one’s own knowledge could be as important a signal of expertise as credentials and confidence

The Langlands program has inspired and befuddled mathematicians for more than 50 years. A major advance has now opened up new worlds for them to explore