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 ...

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

The brains of healthy people aged faster during the COVID-19 pandemic than did the brains of people analysed before the pandemic began, a study of almost 1,000 people suggests. The accelerated ageing ...

Lieke van Son is a research fellow at the Center for Computational Astrophysics of the Flatiron Institute and at Princeton University. She is set to join Radboud University in the Netherlands as an ...

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 ...

To celebrate Scientific American ’s 180th anniversary, we’re publishing a jigsaw every weekday to show off some of our most fascinating magazine covers over the years. Take a tour here through the ...

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