About Time Ending.

Time ending is both inevitable and impossible.
 The way it would end is that if the universe kept expanding, all of the matter would compact into black holes.
After that, the black holes would give out radiation and dissolve. (This is over the course of billions of years.)
The radiation would then dissipate.
 After that. nothing changes.
 Even if one person managed to survive, everything that would happen would quickly undo itself. You could not change anything in the universe, simply, because there would be nothing to change. Nothing has infinite supplies, so everything would come to an end.
  And just sit there.
           Forever.