OK, I just read this answer and I'm still not sure what you find "highly doubtful". Is it the bouncing a signal off a distant object? "Pre-internet" and "pre-Windows 98" hardly qualifies as "primative" technology. It isn't like either of those things was particularly a technological...
No more calls, please. We have a winner. (Nitpick: The Long Kiss Goodnight) Boy, did Geena Davis every look better than in this flick? We now return you to you regularly scheduled thread, already in progress... (Between the cold, the medicine and the turns this thread has taken, I'll...
Neil: I'm sorry, I just thought you were goofing around, because based on what you wrote I'm not sure what "theory" you are having a problem with. If you bounce a signal off an object 10 light years away the "echo" will return in 20 years. (Assuming you can send such a narrow beam that it...