How could BSG's Earth be our Earth when the Cylons only lived there 1000 years then nuked the planet? The other reason maybe the time frame, I doubt it was millions of years in our past because we would have found evidence of there civilation. Perhaps this happen millions of years in our future?
I think BSG's earth is RMD's version of 'Terra'. When Galactica finds a planet to call home will it be our Earth?? hmm