This is a fun read on wikipeida [1]. I'm curious as to how you could disprove it at all: there's a perfectly valid coordinate transformation that maps our "infi

This is a fun read on wikipeida [1]. I'm curious as to how you could disprove it at all: there's a perfectly valid coordinate transformation that maps our "infinity" to the center of the earth, and the center of the earth to infinity. All the laws of physics become position-dependent, of course, and it's not a convenient space for calculations, but it "proves" that the concave earth is a perfectly valid way of describing the universe. [1]: https://en.wikipedia.org/wiki/Hollow_Earth#Concave_Hollow_Earths https://en.wikipedia.org/wiki/Hollow_Earth#Concave_Hollow_Ea...