That does not hold up to theology. God said as punishment for disobedience man would work by the sweat of his brow, the woman would conceive in pain, and God drove them from the Garden. Later, God shortened the lifespan from hundreds of years of life to what we have now. Everyone in Methusala's day lived hundreds of years. I believe it was after the flood God said man would not be allowed to live as long. I don't see Satan changing anyone's DNA in all that. Sin has marred the image of God in man. A fallen nature