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

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

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very similar to classic river deltas on Earth. These are traces of rivers that ...

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

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 ...

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

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