[Michiel]

[color=#000000ost_uid0]Well, I haven't read the definitive text on the subject , but what you say sounds about right. In Back to the future, however, earth hasn't made any contact with aliens, so the destruction could only be limited to our solar system.

I don't think doc Brown thought of it this way though, because he regularly sais that a certain event would "create a major paradox". "major", that means bigger than the avarage paradox. And how can that be, if our theory is correct? Any temporal paradox on earth would cause this destruction in the same way, right?[/colorost_uid0]