Time Travel: Not so unachievable after all

New model 'permits time travel'

Whenever I read or hear about Time travel, my memory takes me back to the wavering snapshots from the Steven Spielberg hit - Back to the Future. In Part - I of that movie, Michael J. Fox, the central character, accidentally replaces his future dad in his future mom's life only to threaten his own existence.
This article [at BBCNews] talks about a new model that gets rid of the famous time-travel paradox [like the one in the Hollywood movie].