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 ...

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 ...