http://www.newsweek.com/amazing-images-surface-mars-and-their-fascinating-scientific-explanations-1044827 > More recently (and less poetically), Mars has entranced billionaire businessman Elon Musk, whose main career goal is to colonize the planet. But Musk’s dream still feels a long way off. > Although a number of unmanned spacecraft have explored the planet’s dusty surface, Mars’ distance, along with its thin atmosphere and freezing temperatures, means it’s far from naturally conducive to human life.