Seismic readings of the interior of Mars strongly suggest large quantities of water buried 6 to 12 miles underground.

Mars might hold enough subsurface water to cover its surface in a global ocean between 0.62 to 1.24 miles (1 to 2 kilometers) ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Mars may have once ...

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 ...

If Mars ever hosted microorganisms in its bygone oceans, their fossils might still be preserved in minerals—and now, we have ...

Many studies suggest then presence of water on ancient Mars billions of years ago,” said Katayama in a statement. “But our ...

A study using radar data from China's now-dead Zhurong rover finds strong evidence that Mars had a stable ocean in the ancient past. Credit: Victor Habbick Visions / Science Photo Library / Getty ...

Explore the universe with news on fascinating discoveries, scientific advancements and more. Mars may have once hosted an ocean with waves that lapped against sandy beaches 3.6 billion years ago, ...

Their discovery showed that even tucked away in our innards – in the walls of our stomachs, subjected to vinegar-like pH ...

More than 3 billion years ago, Mars intermittently had liquid water on its surface. After the planet lost much of its ...

Step aside, Santa Monica. It seems that Mars once had beaches that would give the Californian coast a run for its money.