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RIVER DELTAS AT SIMILAR ALTITUDES HINT AT AN ANCIENT OCEAN
A huge ocean may formerly have covered nearly one-third of the Martian surface two scientists from the University of Colorado at Boulder suggest.
In Nature Geoscience today, Gaetano di Achille and Bryan Hynek report how they analysed data that imply Mars was once covered by a huge ocean of water. Their evidence is a range of dry river d…
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