Evidence of Martian Ocean Mounts

Mars may have once had a vast ocean that covered as much as a third of the planet.

Researchers at the California Institute of Technology have found evidence of an ancient delta where a Martian river may have once emptied into the ocean.

“Scientists have long hypothesized that the northern lowlands of Mars are a dried-up ocean bottom, but no one yet has found the smoking gun,” says Mike Lamb, an assistant professor of geology at Caltech and a coauthor of the paper describing the …

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