Mars – dusty, dry, and desert-clad – was once so rich in water it had not just lakes, but oceans, according to a new study. Observations using ground-penetrating radar have revealed underground ...

Fresh evidence of volcanic activity on Mars is reshaping how scientists think about the planet’s potential to host life, past ...

A primitive ocean on Mars held more water than Earth’s Arctic Ocean, and covered a greater portion of the planet’s surface than the Atlantic Ocean does on Earth, according to new results published ...

Deep beneath the surface of Mars lies a large reservoir of liquid water, according to seismometer data from NASA’s retired InSight lander. The findings, published Aug. 12 in Proceedings of the ...

A vast ocean likely covered one-third of the surface of Mars some 3.5 billion years ago, according to a new study conducted by University of Colorado at Boulder scientists. A vast ocean likely covered ...

PSI: A geologic mapping project using NASA spacecraft data offers new evidence that expansive lakes existed long ago on Mars. The research points to a series of sedimentary deposits consistent with ...

Billions of years ago, it rained on Mars. The water collected in valleys and rivers, filled and spilled over the rims of ...

An international team of scientists who analyzed data from the Gamma Ray Spectrometer onboard NASA’s Mars Odyssey reports new evidence for the controversial idea that oceans once covered about a third ...

It has long been known that Mars once had oceans due in part to a protective magnetic field similar to Earth's. However, the magnetic field disappeared, and new research may finally be able to explain ...

(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. A team of scientists estimates that ...

Mars may be around 140 million miles away from Earth, but the red planet is influencing our deep oceans by helping drive “giant whirlpools,” according to new research. Scientists analyzed sediments, ...