The Elegant Universe: Eleven dimensions, parallel universes, and a world made out of strings. It's not science fiction, it's string theory.
Next to Artificial Intelligence Neurophysics, this topic has always interested me and frankly I don't know where to start from. What amazes me is do humans Invent or Discover these milestones? Were they a reality waiting to be discovered/solved or simply the human mind was intelligent enough to Invent this?
Hopefully u find this interesting and we would start a discussion about it.
EDIT: Visit the live chat occuring today at the Washington Post site
EDIT: They changed the chat location since it ended to Washington Post site