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
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.
Snow dots the Martian landscape in these images from ESA's Mars Express orbiter and NASA's Mars Reconnaissance Orbiter.
Photos of the dormant InSight lander captured from Mars orbit are providing researchers new data on how dust accumulates and evolves over time on the Red Planet.
Just as Homo sapiens once exploded out of Africa to colonize the Earth our influence is spreading in the solar system. New research says we must track the cosmic migration to Mars.
The Curiosity shows sulfur stones, with no explanation of how they occurred on the Martian surface.
