evidence: Flat Earth Society Claps Back at Elon Musk on Twitter In case you needed further evidence that we’re all living in the Upside-Down, on Tuesday, the Flat Earth Society earnestly answered a bizarre question Elon Musk tweeted earlier in the day. Somehow, the saga just gets weirder and weirder. To backtrack, Musk had had trolled Flat Earthers with a couple of tweets, most notably, one asking why there’s "no Flat Mars society." As Inverse pointed out Tuesday, there does seem to be a sect of Flat Earthers who also identify at Flat Marsers, but that’s beside the point.