We're living in a unique time in history. Most of our planet has already been traversed and catalogued by people who have come before us. Earth, at least from a geographical perspective, has few discoveries left for us. The true unknown lies in the worlds beyond our own. It's likely that in the next few decades, humans will finally have the means to take our first tentative steps on the surface of our neighbouring planet, Mars. We will be the first known species that has both the knowledge and the desire to transcend our existence beyond our home planet and expand further into space. There may even be people alive today whose children will be born on a planet that isn't called Earth. For them, the concept of