<ul><li>Saturn's moon Titan has rivers and lakes filled with liquid methane and ethane.</li><li>However, unlike Earth, Titan is missing most of its deltas - landforms where rivers meet seas.</li><li>Scientists studied Cassini spacecraft data and found only two likely deltas near the south pole of Titan.</li><li>The absence of deltas on Titan remains a mystery, with possible reasons being fluctuating sea levels or strong winds and tides.</li></ul>

Saturn’s moon Titan has rivers—so where did all the deltas go?

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