Tucson is the epicenter of a meteorite hunt after a shower of space rocks landed north of the city Tuesday night. The event began at 7:11 p.m. with a window-rattling sonic boom, as a massive fireball ...

TEMPE, Ariz. — Pieces of a small asteroid that left a fiery trail in the sky over a big chunk of Arizona earlier this month have been found by researchers, Arizona State University says. A team of ...

A rare meteorite recovered from Alaska is prompting scientists to rethinkhow Earth got its water. New findings suggest our planet may have had the hydrogen needed to form water on its own, without ...

Earth is often described as a water world, but how that water arrived has never been settled. For years, the focus has rested on asteroids and comets delivering hydrogen long after the planet formed.