Think we are visited by space aliens? Neighbor possessed by Satan? What is the outrageous thing you believe to be true? Me: I think that within 20-30 years, wealthy human beings will be able to extend their life spans almost to a practical immortality, through a fundamental mastery of the human genetic code and control of the mechanisms of aging and disease control. Emphasis on wealth. Within 50 to 100 years, I think you will be able to replace your own organs by simply growing them or replacing them with synthetic parts. This will be the century that will fundamentally redefine what being 'human' actually means.