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teethi- If you're interested in that concept, find the short story 'They' by Heinlein, it's a classic. And for anyone who likes thinking about this, go to the library and get any one of Isaac Asimov's essay compilations- they are a trip.
And Nine_Milla- studies have recently shown that inbreeding really doesn't have a significant effect on offspring, after all- only a 1 to 2 percent increase in the chance of getting certain hereditary diseases.
As for the subject of time travel... the way we think about it, time travel doesn't exist... because there isn't any 'past' saved up like your history in a computer, and the 'future' doesn't exist yet... when scientists debate the current concept of 'time travel' using the theory of relativity, they're talking about slowing down your actual realization of time so that the rest of the universe progresses at a faster pace than you do. Say you pilot a space ship around the edges of event horizon in a black hole and emerge again... you were travelling so fast that time went slower for you. So you flew for say 5 years, but 50 years has progressed everywhere else. That's all we have for time travel, at the present- and of course it's only a theory.
Emily Bennett is a Lizard King-loving Sex Goddess!
'Have you been borne yet & are you alive?
Let's reinvent the gods, all the myths of the ages.'
- Jim Morrison, 'An American Prayer'