User blog comment:Adventuretimegenghiskhan/Is Ooo on Earth/@comment-3403410-20110224213146

Yeah, but is it for sure. I think it is because most things resemble mutated forms of familiar biotic factors around today. Also the water/land proportion in the real you look the same but continents are very slightly different, probably because of what caused that crater (what caused that crater anyway? Was it the mushroom war? Pen said atomic explosions were involved, but radiation affects living things, it does not create big holes in the ground.)