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Episode 314: The Mountains of Iapetus

Play Jan 13•4:33

A huge, mountainous ridge circling the equator of Saturn's moon Iapetus was discovered in 2004 by the Cassini spacecraft. The ridge reaches 12 miles high and runs 1,000 miles (1,600 km) from end to end. Astronomers now propose a new idea for its formation. Science Daily on how Iapetus got its ridge. Cassini?s Iapetus flyby.

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