Geologically, Mars is very reminiscent of the moon. But it also looks a lot like the Earth. It all depends on who you ask.

An exploding budget and an unraveling schedule spell disappointment for NASA's mission to learn more about Mars's history.

NASA Administrator Bill Nelson left a final decision on a new mission architecture to the next NASA administrator working ...

NASA sees two paths for saving its beleaguered plan to retrieve materials from the Red Planet but won’t choose between them ...

NASA announced Tuesday that it is exploring two options to move forward with its mission to return samples from Mars at a ...

NASA unveils a groundbreaking approach to bring Martian rock samples back to Earth by 2026, introducing competition between ...

Unlike the dunes on Earth which are constantly in motion, the kidney bean-shaped dunes on Mars appear surprisingly motionless ...

NASA is weighing two options to return samples from Mars — one using proven technology and another that seeks help from ...

A switch to Mars would impact programs such as the moon-focused Space Launch System, a multibillion-dollar rocket that ...

A famous illustration of Saturn's moon Titan got it all wrong. Never mind -- what we imagine space to be, and what we know it ...

NASA's mission to return samples from Mars and potentially discover the first signs of alien life has a new timeline. The samples may arrive sooner.