A rare exoplanet that should have been stripped down to bare rock by its nearby host star’s intense radiation somehow grew a puffy atmosphere instead — the latest in a string of discoveries forcing scientists to rethink theories about how planets age and die in extreme environments. Nicknamed ‘Phoenix’ for its ability to survive its red giant star’s radiant energy discovered planet illustrates the vast diversity of solar systems and the complexity of planetary evolution — especially at the end of stars’ lives.