"Shorelines are great locations to look for evidence of past life." Today, Mars is a chilly desert of rock and dust — but 4 billion years ago, the planet had rivers, lakes and even oceans with sandy ...

Mars may once have held enough water to fill oceans and form coastlines. The planet’s red dust contains water and likely formed in cold conditions.

An arrowhead-shaped rock on Mars sporting features that may hint at ancient microbial activity on the Red Planet has left ...

As the planet cooled, some of the water likely moved ... so this is painting a picture of ancient habitable environments, capable of harboring conditions friendly toward microbial life.” ...

Research indicates that they are billions of years old. Could these be remnants of an ancient planet that once collided with Earth? Scientists have discovered that two massive structures deep ...

China's Zhurong rover has found evidence of an ancient shoreline buried deep beneath the planet. That could point to an ocean, a beach, and to life.

Mars – dusty, dry, and desert-clad – was once so rich in water it had not just lakes, but oceans, according to a new study.

or ancient volcanic activity. "We're seeing that the shoreline of this body of water evolved over time," Cardenas said. "We tend to think about Mars as just a static snapshot of a planet ...

Right now, the dramatic warming of the planet that marks the human-fueled climate crisis is happening at breakneck speed compared with these ancient processes that took millions of years.