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"Another reason why privacy could be just a passing fad, terrorism is going to get too good. [1997]"
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It seems clear that at least part of the breathable mix required for Trinocs can be taken directly from the atmosphere.
This is actually a pretty good idea, since similar products called "oxygen concentrators" are starting to replace oxygen cylinders. They are substantially less dangerous that cylinders of oxygen.
Aliens in sf sometimes require something in addition to the elements of Earth's air. In his classic 1953 novel Childhood's End, for example, Arthur C. Clarke's Overlords sometimes needed more than the atmosphere provides:
Compare to David Brin's oxygen hip flask from his 1990 novel Earth. Comment/Join this discussion ( 0 ) | RSS/XML | Blog This | Additional
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Science Fiction
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'The operation that had transformed half his body... had located the control switchboard in his teeth.'
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