One of the reasons I like Sci-Fi so much is that because if they can dream it, they can do it. Almost everything writen about in Sci-Fi either has been done, or is being worked on to some extent.
Time travel, of course, being the most difficult I'm sure.
Did you know that a satellite was recently launched using ION propulsion?
Hmm...what Sci-Fi icon used ION thrusters? TIE fighters...among others...
