Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

The company notified users that anyone using hardware security keys or passkeys tied to twitter.com must reenroll them under ...

Eight AI bots contribute about 10 percent of the platform’s “Community Notes.” Sign up for the daily CJR newsletter. Last ...

The authors used a Bayesian modeling framework to fit behavior and serotonin neuron activity to reward history across multiple timescales. A key goal was to distinguish value coding from other ...

The global AI arms race stays in constant flux, this time thanks to the arrival of a new model from the up-and-coming Chinese AI lab Moonshot.

From flawless AI memes to uncanny deepfakes, Sora 2 blurs the line between creative tool and ethical dilemma. Here's what you need to know.

On November 3, 1965, Major Robert Rushworth made the first flight of the modified X-15A-2 rocketplane, reaching Mach 2.31 ...

NASA and Lockheed Martin’s X-59 "quiet" supersonic plane flew for the first time in October. It’s a major step towards ...