A straightforward conjecture about runners moving around a track turns out to be equivalent to many complex mathematical ...

The space between galaxies is not empty. In a new map of the early universe, those “blank” stretches take on a faint, hydrogen-blue glow that had mostly escaped surveys until now. Astronomers working ...

Community colleges are spending millions on AI-powered chatbots that students say often give inaccurate answers. Many might see upgrades this year.