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The Hollow Earth theory is/was a pseudoscientific idea that our world is actually on the inside of a large sphere. The "sky" points inward towards the center, where the "Sun" (a light source) is, w...
#1: Attribution notice removed
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System
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2020-06-01T14:13:46Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/q/27449 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/