question about artificial intelligence the movie

ok so in teh end the aliens are able to revive his mom for one day cuz he had very little dna, ok why didnt get just keep cutting a piece of him moms hair that same day, she is a whole piece with allot of hair and everything, that means unlimited mom revives. lolololol




and what if pinokio said "my nose will now grow" what will happen


and can the world end on 13/13/13?