The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

A giant collision in Mars’ early history created a global magma ocean and buried large fragments of debris deep within the young planet. As Mars cooled, it formed a solid crust — eventually becoming a ...

Mars's atmosphere and climate are impacted by interactions with solar wind, a stream of plasma comprised of protons and electrons that flows from the sun's outermost atmosphere (corona), traveling at ...

Millions of mysterious black streaks littered across the surface of Mars have puzzled scientists for decades, but now researchers may finally have a proper explanation. The new theory also explains ...

Billions of years ago, Mars’ Jezero Crater held a lake fed by rivers that could have carried minerals and maybe even organic matter. On Earth, places like that are teeming with microbial life. NOVA is ...

Sending humans to Mars is far more difficult than it seems. From radiation to logistics, every challenge multiplies over distance. Discover why the Red Planet remains out of reach and what must change ...