Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.
They say sequels are bad, but the sci-fi genre alone has enough legendary follow-ups to argue against that statement.
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5 masterpiece sci-fi sequels better than Star Wars: The Empire Strikes Back
The Empire Strikes Back is sci-fi perfection, but there are a few sequels even better ...
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