Ridge on Saturn's moon created as ring slammed into the equator

In the five years since Cassini released images of a bizarre ridge encircling the equator of Saturn's moon Iapetus, astronomers have struggled for an explanation.

Ridge, not global warming, causing major glacier to melt

In a discovery likely to fan the flames of climate change debate, a team has concluded that the thinning ice on one of Antarctica's major glaciers is not caused by global warming.