Mountains on Saturn moon may have come from space

Ridge around Iapetus’ equator may be built from celestial debris

By Meghan Rosen, 17:42 PM April 21, 2014

A mysterious mountain ridge ringing the equator of Saturn’s moon Iapetus may be a load of space rubble.

Ever since the Cassini spacecraft spied the jagged belt wrapped around Iapetus’ middle in 2004, scientists have debated the ridge’s origin. Some think volcanoes shoved it up from beneath the moon’s surface or that tectonic activity created the range. Others think that the towering mountains, which may reach more than twice the height of Mount Everest, could be remnants of rings that once orb...

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