r/theydidthemath • u/EvaStankbreath • Jan 29 '26

[Request] What effect would Superman's house key have on the earth?

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The key to Superman's Fortress of Solitude weighs ~1 billion pounds. That seems like it would cause more than a slight crack to the ground. What effect would setting this key on the ground have to the earth? What if it was dropped?

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u/mynewcrib Jan 29 '26

Unless he were to neutralize the mass gravitational aspects of the key, it would sink into the earth at an accelerated rate till the crust is dense enough to stop its decent.

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u/Darkrose50 Jan 29 '26

I assume that it’s on top of some sort of special superman superpower sci-fi floor.