It isn't already ending because of the abominations nowadays that we call "entertainment" and "music"?Snarkiness aside,An incredibly intelligent parasite can affect the human race,We could de-evolve,or in billions of years all the gas and toxins would buildup into the sun,causing the sun to swell to a massive size and than go down to a miniscule size and become a dwarf planet,ALL life on earth would go extinct after a while.