As the Earth Lay Dreaming

Three hundred million years in the future, the world would be practically unrecognizable to us. Due to the gradual process of plate tectonics, all the continents have merged back together into a single supercontinent, called Neopangea. Likewise, humanity has now evolved to live beneath the Earth's crust. For a while now, Humans have lived deep into the Earth, growing fully accustomed to underground life.
But one question remains - What lies beyond? What is there to be found not just above the surface, but above the horizon? What treasure awaits humanity within the little lights in the sky, which we call planets and stars? It is indeed an intriguing mystery, but perhaps only the most daring of adventurers are willing to seek answers .