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A comment on Mars Lost Its Magnetic Field – and Then Its Oceans. Parent comment

Re:Mars Lost Its Magnetic Field – and Then Its Oceans by kaz-inc on Sunday October 29, 2023 @06:48PM (#38063625)
this[1] places them at 3k years old: https://en.m.wikipedia.org/wiki/Qanat
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Re:Mars Lost Its Magnetic Field – and Then Its Oceans by withinboredom on Sunday October 29, 2023 @06:54PM (#38063664)
That sounds more right to me than a memory of some random conversations from nearly 20 years ago.
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