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 ...

The inner solar system is a lot calmer than it was 4 billion years ago, during what’s known as the heavy bombardment period. Over the course of that violent stretch, which lasted about 500 million ...

Space mining often sounds like a fast route to endless metals. In practice, the first question is simple: what are small ...

Grab-and-go missions to asteroids have provided some of the most scientifically valuable samples since the Apollo ...