A long time ago, when the Sons of God — aliens or angels or possibly supermen — mated with beautiful human women, the Lord God was not happy, according to the Bible.
Then the Lord said, “My Spirit will not contend with humans forever, for they are mortal; their days will be a hundred and twenty years.” [Gen 6:1-7]
And then he saw just how wicked humanity had become, and decided to wipe out all humanity, save for the one man and his family who remained untouched by their DNA, Noah.
So it’s no real surprise that despite many spectacular medical breakthroughs, nobody lives much longer than 120 years. Does reaching this limit indicate to God that it’s time for another culling of the human herd?