SAN FRANCISCO -- Five years ago, San Francisco State researcher Andisheh Mahdavi and his colleagues observed an unexpected dark core at the center of Abell 520, a cosmic "train wreck" of galaxy ...

If you want to find one of the universe’s crown jewels, you’ll first need to find a Sun-like star. There’s one pretty close to us, only about 93 million miles away, but it’s got another 5 billion ...

A recent discovery changes our understanding of helium, a gas considered inert, by revealing its ability to bond with iron under extreme pressures. This breakthrough opens new perspectives on the ...