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https://www.cnn.com/2018/12/18/world/saturn-rings-scli-intl/...

Saturn's rings make it one of the most striking planets in the solar system, but scientists believe they could disappear in less than a 100 million years -- which isn't all that long when you consider that the gas giant itself is more than 4 billion years old.
New research from NASA shows that the rings, made predominantly of water ice, are being pulled apart by the planet's gravity and onto Saturn's surface as deluges of "ring rain."

"We estimate that this 'ring rain' drains an amount of water products that could fill an Olympic-sized swimming pool from Saturn's rings in half an hour," NASA's James O'Donoghue, lead author of the study, said in a statement.

"From this alone, the entire ring system will be gone in 300 million years, but add to this the Cassini-spacecraft measured ring-material detected falling into Saturn's equator, and the rings have less than 100 million years to live," he added.

... lots more at link
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