Prophet Noha And Flood
There are no details available of all the people after Adam. If there were any other civilization it is not known What we know is that the people of Noah were destroyed and then God announced that from them great nations would come. Then bible tells that the progeny of the sons of Noah spread across the world. The title Adam sani is not given by God, but by the people. If there were people other than the descendents of Noah’s son’s, they were so insignificant that the no one mentioned them.