Quote:
Originally Posted by Gibbo
What about my all time favourite "The Time Ships" Stephen Baxter is that Hard SF? I think so....
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"I
hate time travel."
-Kathryn Janeway
I personally don't consider time travel and traveling to alternate realities Hard SF... and especially when accomplished by ships made out of quartz by Victorians using "Platternite." (Not that the story isn't good, mind you--I haven't read it.) Time travel and alternate realities are wonderful and inventive theories, with obvious attractions, but without any concrete basis... which makes them Soft SF.