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A comment on Ancient shell shows days were half-hour shorter 70M years ago. Parent comment

Re:Ancient shell shows days were half-hour shorter 70M years... by pjc50 on Thursday March 12, 2020 @09:26AM (#22556541)
From Newtonian mechanics, the orbit can only change by applying a force from somewhere, and a big move would require a lot of energy. And there's no evidence of such an event in the geologic pas; if it was triggered by an impact, it would be far larger than the one which killed the dinosaurs.
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Re:Ancient shell shows days were half-hour shorter 70M years... by wool_gather on Thursday March 12, 2020 @11:26AM (#22557817)
There's a reasonably thorough discussion of this topic, from an...interesting...perspective, in this essay: "How to Destroy the Earth" https://qntm.org/destroy
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Re:Ancient shell shows days were half-hour shorter 70M years... by dr_zoidberg on Thursday March 12, 2020 @10:18AM (#22557106)
Addendum: far larger than the one that created the moon.
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