The asteroid that exploded over Chelyabinsk injured around 1,500 people, damaged thousands of buildings, and exposed an uncomfortable truth: scientists completely missed it, even as they were ...

Is Planet 9 real? Scientists have found compelling evidence that a hidden world may be lurking at the edge of our solar system, far beyond Neptune. In this video, we explore the mystery of Planet 9.

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our solar system that could support life in some form. This artist's concept ...