While Peggy went to sleep at around two or so, Maevis and Skye stayed awake until some time after four in the morning. They'd written down any and all legends they could remember. Some were from the ancient cultures, some were from more recent times. Anything that mentioned a world-ending event.
Based off of the ancient religions and cultures, the two surmised that catastrophic prophecies all had the same underlying point: the world would end no matter what. What happened afterwards varied text to text.
Some said that the world would literally be destroyed. The legends ranged from the planet being swallowed whole or destroyed by galactic-sized entities, to more simplistic scenarios like the planet being unable to support life after. Some were more optimistic; calling the aftermath 'heaven on earth' or a 'utopia' once the chaos settled. Either way one looked at it, the bottom line was that the world that everyone knew would cease to be.