Mars was once home not only to an ocean but "vacation-style" beaches with sun, sand and softly lapping waves, new findings suggest. Researchers now believe that the planet was covered in a huge oc ...

Researchers have found new evidence for a massive subsurface ocean on Mars, again raising the possibility of microbial life.

Present-day Mars is a barren and inhospitable planet, but it may have once had sandy beaches and tranquil ocean vistas. According to findings published on February 24 in the Proceedings of the ...

Seismic readings of the interior of Mars strongly suggest large quantities of water buried 6 to 12 miles underground. Persuasive new evidence supporting the possibility of liquid water deep ...

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 long believed that Mars had a vast ocean, and this new study supports and expands on that idea.“We think that this ocean may have connected to a system of underground lakes that ...

The “Mars ocean theory” has long been the topic of discussion among scientists and cartographers due to Mars’s geography, which suggests a large northern ocean once existed on its surface.