Scientific American.com

Aging is a complex process that plays out differently across different organs, according to growing evidence

Astronomers think small space rocks from beyond our solar system routinely strike Earth—but proving it isn’t easy

Here’s how the new tetrahedron-based design for the “Trionda” soccer ball may affect next year’s big game

Tens of millions of people are already under heat alerts, and the worst is yet to come

Think: subzero temperatures, bone-rattling storms and mysteries about the future of our planet under the ice.

Hulk Hogan, a larger-than-life wrestler known for his showmanship, succumbed to cardiac arrest after a career marked by digital hoaxes and a landmark battle against online exploitation

A controversial arsenic microbe study unveiled 15 years ago has been retracted. The study’s authors are crying foul

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 evidence of “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