there might be forgotten knowledge but when its in the koran its not lost, lets rediscover it  https://wikiislam.net/wiki/Flat_Earth_and_the_Quran Qur'an 88:20 - sutihat (spread out flat)  وَإِلَى ٱلْأَرْضِ كَيْفَ سُطِحَتْ  Wa-ila al-ardi kayfa sutihat EAT THAT YOU DEVIL