Above the sharks: Historic space mission captures images of Australia as it returns to Earth  SBS NewsSpaceX Polaris Dawn crew returns home after history-making mission  CNNPolaris Dawn: Space X mission led by millionaire Jared Isaacman returns to Earth  BBC.comTech billionaire returns to Earth after first private spacewalk  9News41-year-old who just completed the first civilian spacewalk dropped out of high school to start his $7 billion business  CNBC