Extras

Before it was a dry planet, Mars was a wet world that may have hosted life.
The Planets: Mars Preview

Mars, the Red Planet, Was Once Blue
Mars once had rains, rivers, and in the northern hemisphere, a vast sea.
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Before it was a dry planet, Mars was a wet world that may have hosted life.
Mars, the Red Planet, Was Once Blue
Mars once had rains, rivers, and in the northern hemisphere, a vast sea.