And space elevators and numerous others - just looking at my Clarke, Heinlein and Asimov collection here...like you Patrick, they were my tope 3 authors while growing up.

Very sad.
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock