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this post was submitted on 30 Oct 2023
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Asklemmy
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This actually a real phenomenon.
But it's practically unnoticeable on earth in real terms.
So there could be some sort of super dense mineral in some places. Or basically hollow earth in others.
This isn't realistic really but you said it doesn't need to be 100%
The problem with that is it doesn't account for changing gravity patterns. I think as soon as you explain part of it realistically people ask questions about the rest and that becomes a whole scientific discussion
I'm more interested in the effect it'd have on society, evolution, etc rather than the practicalities of how it could happen in the first place personally
Changing gravity could certainly be explained by super dense mineral clusters. Once you get below the mantel the Earth is essentially a liquid... it isn't so beyond belief to imagine a world where mantel temperatures are higher and everything below the thin outer crust is fluid... if we then imagine pockets of super dense material with weird magnetic properties it'd be possible for large clumps of that to float through the mantel and cause interesting variations in gravity. Gravity follows the inverse square law so a super density fluid traveling through the upper mantel would potentially cause some really odd effects.
You should read The Three Body Problem by Cixin Liu