Is Anybody Out There ?
Nothing has spurred the search for extraterrestrial life as much as the discovery of thousands of Earth-like planets by the Kepler probe. On this basis, we can now calculate how many stars in the Milky Way could have a planet like ours: 1 billion. If we could prove extraterrestrial life, this would fundamentally change the understanding of our world, our life and our self. Shall we try to contact? Or should we hide?