NASA’s Curiosity rover has photographed a bizarre, coral-shaped rock on Mars, believed to have formed billions of years ago.

"The structures that we were able to identify in the images are clearly the mouth of a river into an ocean." The post ...

The surface of Mars looks like an empty red wasteland. But if you look a bit closer, the remnants of an ancient alien civilization begin to take shape. At least, that's the conclusion of George J.

Mars has a clear structure in its mantel, and its crust includes distinct reservoirs, scientists have said. Those are the findings from meteorites that originated 1.3 billion years ago on the red ...

Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

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

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

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

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