Some theologians believe there might have actually been "a world before the void". You see, Genesis 1 says "In the beginning, God created the heavens and the earth." The direct translation of verse two does not say "Now the earth was formless and void" it actually says that the earth BECAME formless and void. So maybe..........God restarted with Adam and Eve? Maybe, we are BOTH right. Obviously, there is no proof of this but it makes sense as to why some evidence would imply of a 4 bil y o earth. Even if this is not the case, the worldwide flood would explain the layers of the earth and as to why it would seem older. Have a nice day!