Think about it, what do the following have in common? Superman (1978) – The classic protector of Earth against villains like Lex Luthor. Man of Steel (2013) – Modern retelling of Superman’s role as Earth’s guardian. The Avengers (2012) – Earth’s mightiest heroes unite to stop Loki and alien invasion. Interstellar (2014) – Humanity seeks to protect its future when Earth becomes uninhabitable. Guardians of the Galaxy (2014) So where did this idea come from, that the galaxy