Three billion years ago, you could have stood on Mars and watched a river spill into a sea. That picture is still speculative ...

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very ...

Scientists have traced ancient Martian shorelines inside a giant canyon, revealing where a vast ocean once stood and why ...

Mars is absolutely dripping with evidence that the red planet was once a striking blue, complete with glistening lakes, ...

Ancient shoreline features hint that water on Mars once formed a vast ocean.

Data collected by China’s Zhurong rover has provided new evidence that Mars may once have hosted large oceans. Subsurface radar and geological features suggest the presence of ancient shorelines and ...

Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean billions of years ago ...

The red planet was half blue, according to space scientists. A research team using images from cameras on Mars-orbiting ...

In the eyes of many planetary scientists, the surface of Mars's northern hemisphere has long looked like it once contained an ocean. Now it is "sounding" that way, too. Previous evidence for an ...

FAYETTEVILLE, Ark. — Researchers at the University of Arkansas have recently discovered geological formations on Mars that suggest the past presence of large rivers that once flowed into an ocean.

Billions of years ago, water flowed across Mars. Most scientists agree the red planet had rivers. But did those rivers flow into an ocean? New research from the University of Arkansas found strong ...