Can you look back in time?

It is theoretically possible. Ignoring the pure impossible-ness of it, speeds faster than light would likely push you back in time. This would do so much for the human race, as we could travel to nearby galaxies and such in a greatly reduced time, plus we would be able to time-travel. There would be complications though, as you wouldn't be able to get back to the present day without aging, plus there is the case of not changing anything in the past. I like the thought of this, it's really interesting.