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

Recent discoveries have revealed that Mars’ core may be heating up unexpectedly, challenging long-held assumptions about the ...

In the 1960s, humans set out to discover what the red planet has to teach us. Now, NASA is hoping to land the first humans on ...

Astronomers have been searching for a Earth-like exoplanet for decades now, and a very promising candidate has entered the running.

By Ashley Strickland, CNN (CNN) — Data from a retired NASA mission has revealed evidence of an underground reservoir of water deep beneath the surface of Mars, according to new research.