NavList thread: A good clock for a few billion years

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05 May 2019, 16:03 | Frank Reed
06 May 2019, 01:39 | Geoff Hitchcox
06 May 2019, 03:53 | David C
06 May 2019, 04:06 | David C
06 May 2019, 04:12 | Robert VanderPol II
06 May 2019, 09:03 | Bill Lionheart