Submitted by rbv201 t3_11y7z6f in explainlikeimfive
rbv201 OP t1_jd96ih3 wrote
Reply to comment by Lirdon in ELI5: have “years” been constant across time? Like 3.5 billion years. by rbv201
Thanks for the answer! The idea of the atom frequency as a constant (the same hourglass back then as now) is very interesting. Thanks again!
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