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Contact: Brian Hynek
University of Colorado at Boulder

Ancient Mars ocean

Caption: This is an illustration of what Mars might have looked like some 3.5 billion years ago when an ocean likely covered one-third of the planet's surface, according to a new University of Colorado at Boulder study. (Illustration by University of Colorado)

Credit: University of Colorado

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Related news release: New CU-Boulder study indicates an ancient ocean may have covered one-third of Mars

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