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9

Make the plate tectonics that throw up the mountains super aggressive. [ https://en.wikipedia.org/wiki/Fitz_Roy#/media/File:Fitz_Roy_Chalten_Argentina_Todor_Bozhinov_2013.jpg The process that lifts mountains on earth can lift some crazy jagged mountains. Gravity has got nothing on plate movements. Sure gravity is going to whittle them away via "mass ...


4

You'd need to decelerate it enough that the periapsis of its orbit falls below the surface of its primary, so the specific energy requirements are going to depend on the details of its orbit (semi-major axis and eccentricity, mostly). For best efficiency, you'll want to slow it at the apoapsis of its orbit (when it's furthest from the planet). At that ...


4

No, this would not be a feasible weapon. Although I originally posted an answer to this question five years ago, I've since deleted it and am starting anew. One reason I deleted it is that the answer only tangentially addressed the question, despite receiving some upvotes. The other reason is that the portion that does, in my opinion, adequately work ...


3

They wouldn't. Pretty much all of the food we eat comes from the outdoors, and is worked by people who work in the outdoors. With gravity reversed, that food cannot be tended to without some significant modifications in processes. But those modifications can't be made. I'm going to write off anyone that's outside at the moment of reversal. There might be ...


2

Whoever is not under a roof of some sort and sturdy enough to sustain their weight when this happens is doomed to be dead, because they will fly out to space. Then those who survived might try to continue their normal life, as long as they have some sort of vehicle under an accessible roof: normally there are no holding points on the ground, so unless a ...


1

A low density of mountain composition i.e. in the planet crust. Maybe this planet hasn't got a asteroid bombardment during their formation and high dense materials compose the core, and light ones are in the surface. Could be a cold planet, with ice and other volatile compounds mixed well in the rocks. The rotation of planet is also kinda slow and the cold ...


1

Planets, including super earths, come in all sorts of sizes. There are literally trillions of planets and moons in our galaxy alone, and it’s easy to imagine a slightly larger or denser rocky planet with 1.1g or 1.2g on which humans could survive with little adjustment needed. With rigorous training, the average human can walk around on a planet with 3 to 4 ...


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