Mars

There are many obstacles to overcome before humans can set foot on Mars, including problems surrounding launch mass and closed-loop systems and the hazards of space radiation.

Scientists may have figured out how Mars hung onto its surface liquid water in its ancient history via alternating periods of hot and cold. But what would the impact have been on habitability?

Buttes and mesas in Mars' Chryse Planitia contain clay minerals made from liquid water interacting with the rock nearly 4 billion years ago.

A study of volcanic cones near the equator on Mars is challenging what scientists previously knew about when and where water flowed on Mars.

Scientists expect the moon to have better soil for growing food than the red planet

It’s time to ring in the Martian New Year with a variety of strange sights on the planet’s Northern Hemisphere.

Researchers believe dark rocks at the site of a future Mars rover landing mission may be left over from ancient volcanic eruptions, and may be protecting signs of life — if there ever was life on Mars.

An independent review team is delivering a final report to NASA leadership to determine if the agency's Mars Sample Return mission is salvageable after facing scrutiny for its $11 billion budget.