11KiB, 439x488, Hexagonepierre.png View SameGoogleiqdbSauceNAO Anonymous Fri 05 Mar 20:45:07 2021 No.12794203 ViewReplyOriginalReport Quoted By: >>12794214 thought experiment I had, what if we make a really steep shaft, run a cord through it with a weight at the bottom and observe it's movement. can we like make seismic activity visible?
