After traveling all around the world on Google Earth, I was sorely disappointed that I couldn't go back as far in time as I would have liked. I know that the views of our area are at least a couple of years old -- the carport on our house isn't there, and the stupid apparently abandoned white pickup that was across the street from our old duplex (rudely parked so as to make backing out of our driveway inconvenient and hazardous for pedestrians, forcing young couples with baby strollers out into the street) was there. (The pickup just disappeared one day.)
I suppose that a google earth could be kludged together with some of the oldest satellite pics, so you could go back a few decades, and the zoom levels wouldn't be that great, but I want more than that -- I want to be able to look back a few hundred or a few thousand years. Or how about Google Earth Time Travel Video?!
S. said I should submit my request to Google, but I'm thinking that my physics majors would be a better bet.