A hypothetical picture of Mars 3.6 billion years ago, when an ocean may have covered nearly half the planet. The blue areas show the depth of the ocean filled to the shoreline level of the ancient ...

Researchers have found new evidence for a massive subsurface ocean on Mars, again raising the possibility of microbial life lurking deep below the Martian surface. As detailed in a paper in the ...

Mars once featured sun-soaked, sandy beaches with gentle, lapping waves from an ancient ocean, a new study suggests. Why it ...

"Our new picture of Mars," Pollack said yesterday, "is much like the Earth without oceans." The dark areas are contintents, and the bright areas are dry ocean basins. There are differences ...

has found new geological evidence suggesting that Mars might have once hosted a vast ocean. The study, published in Nature, strengthens the theory that an ocean may have covered nearly a third of ...