As for the aliens I know a specialist - no, better to say - believe that aliens from space have been on Earth thousands of years ago. This led to the emergence of modern religions and holy books. As we know, any religion in this earthly madhouse declares that only its scriptures are true. This - for God's sake! - Should we believe? And what should we believe? Most religions predict any end of the world. There are religions that proclaim that the unbelievers will be cooked alive, drowned, burned, stabbed, poisoned ( "bitter water"), shot, buried in an earthquake or erased from litsazemli any epidemic. Fortunately, this only applies to unbelievers - but wait a second! What we have in mind unbelievers? Those who do not believe in the Catholic dogma? Those who had the misfortune to be born in the Arab and Asian countries and have never heard about the teachings of Islam or Hinduism? Those who are not fortunate to grow up a Christian or any other religion? Those who are followers of Shinto in Japan, or those who do not believe in the Book of Mormon or in the teachings of Scientology?