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NASA's Mars spacecraft and rovers have already found widespread carbonate deposits on the planet.
And NASA's next Mars spacecraft will help probe the fate of planet's atmosphere.
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The results mean liquid water flowed on Mars within the last 700 million years, either from geothermal or hydrothermal heating, Tomkinson said.
"This process could have been an even bigger player when Mars was thought to be a warmer and wetter planet," he added.