Scholarly article (Science or Discover magazine, maybe?) about the end of the world / universe?

I'm interested in reading a scholarly article in science that discusses possibilities for the end of the world or collapse of the universe. I know that's really broad. Any suggestions?
You should google such topics as Black Hole Dissipation and Hawking Radiation. Stephen Hawking hypothesises that the end of the universe has several stages, taking trillions [...]