Editing Iapetus (moon) (section)

==Formation==
The moons of Saturn are typically thought to have formed through [[Accretion disc|co-accretion]], a similar process to that believed to have formed the planets in the Solar System. As the young gas giants formed, they were surrounded by discs of material that gradually coalesced into moons. However, a proposed model on the formation of [[Titan (moon)|Titan]] suggests that Titan was instead formed in a series of [[giant impact]]s between pre-existing moons. Iapetus and Rhea are thought to have formed from part of the debris of these collisions.<ref>{{cite web |title=Giant impact scenario may explain the unusual moons of Saturn |work=Space Daily |date=2012 |url=http://www.spacedaily.com/reports/Giant_impact_scenario_may_explain_the_unusual_moons_of_Saturn_999.html |access-date=2012-10-19 }}</ref> More-recent studies, however, suggest that all of Saturn's moons inward of Titan are no more than 100 million years old; thus, Iapetus is unlikely to have formed in the same series of collisions as Rhea and all the other moons inward of Titan, and—along with Titan—may be a primordial satellite.<ref>{{Cite web | url=http://www.space.com/32378-saturn-rings-and-moons-younger-than-dinosaurs.html | title=Saturn's Moons and Rings May be Younger Than the Dinosaurs| website=[[Space.com]]| date=25 March 2016}}</ref>