Does anyone know why the universe began? Why did life on earth began? Are there any "right " religions? What happens to you after you die? (Besides the usual process.) What is the purpose of life? Why is the sky blue? Why is the universe black? Is time travel theortically possible? Is it impossible to go back in time before you created the time machine? What would happen to you if you went back in time and killed your grandfather, before you were born? If you go back in time, can you alter the past? What would happen if you did ? Would there be a different future?