Scientists identify a “bathtub ring” feature on Mars that may indicate an ancient ocean, based on landform analysis and ...

Researchers have discovered huge landforms deep beneath the North Sea that suggest the region was swallowed by a giant ice sheet toward the middle of the last ice age. The scientists captured these ...

Mars may have once held a vast ocean across its northern lowlands, and the clearest clue may not be the faint shoreline ...

For more than 30 years, scientists have argued over whether a vast ocean once spread across the northern third of Mars. Now a team led by Abdallah Zaki of the University of Texas at Austin has found ...

By Will Dunham WASHINGTON, April 15 (Reuters) - There is a lot of evidence from orbiting satellites and surface rovers indicating that liquid water was present long ago on the surface of Mars in the ...