For those who would care to answer this title question, please consider this: the KJV and NIV differ on the very first sentence of the bible (Gen 1:1); therefore, only one of them is correct: and if a bible is incorrect on the first sentence, can anything else that follows be trusted? Really, if the first sentence of a math book read '1+1=3', would you then be foolish enough to try and learn the truth from it?
So, which is right, the KJV or the NIV? The way i intrepret Gen 1:1 is that after the first sentence there was then in existence a place called the earth and a place called heaven, not heavens (plural) as the NIV (and most other bibles) translate.