The universe is magnificent and vast. Hundreds of billions of galaxies, trillions of stars, and even more planets. If even the tiniest fraction are habitable, then the Universe should be teeming with life. And yet we see nothing, only vast emptiness. Where is everyone else? The answer to this riddle could be as exciting as it is creepy: we are early, born before almost all other life – but very soon this may change. Not only might aliens appear, they could quickly surround us. An irreversible competition for the universe might be about to begin.