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Dinosaurs were around before Saturn had rings.
(feddit.de)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
Interesting thought, but the rings may be older than that, and they may be reoccurring. That's just an estimate based on a range calculated in a recent study.
https://www.universetoday.com/161444/saturns-rings-are-much-younger-than-the-planet/
There's a lot more learning to do.