Long thought of as a dry, barren world, Mars may once have shimmered with shades of blue. A new study reveals the discovery of ancient river deltas on the Red Planet, offering the clearest evidence ...

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 ...

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Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of Mars as ...

The red planet was half blue, according to space scientists. A research team using images from cameras on Mars-orbiting spacecraft say it was a "blue planet" around three billion years ago – with 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.

Three billion years ago, you could have stood on Mars and watched a river spill into a sea. That picture is still speculative, but new evidence makes it harder to dismiss. Researchers at the ...