Mountains on Saturn moon may have come from space
Ridge around Iapetus’ equator may be built from celestial debris
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/04/mr_N00091828.jpg?fit=860%2C460&ssl=1)
RING REMNANTS The mighty ridge adorning Saturn’s moon Iapetus has steep slopes, which researchers suggest is a sign that debris falling from space stacked up and formed mountains on the moon’s surface.
JPL, Space Science Institute, NASA