We're just weeks away from this interstellar visitor reaching its brightest in Earth's night skies. Will we see it?

A newly discovered space rock will zoom safely by Earth later today (Oct. 15) at only about a quarter of the average distance ...

CO₂ ice blocks on Mars may dig gullies as they slide and sublimate in the thin atmosphere. In lab experiments, scientists recreated these eerie, worm-like movements under Martian conditions. The ...

The findings may redefine the known boundaries of life on Earth and offer a model for what microbial life might look like on Mars or other arid planets.