Tunnel in the Sky by Robert Heinlein:
Science Fiction Inventions, Technology and Ideas

This novel was one of a group of novels written expressly for young people in the 1950's, but many adults have also taken pleasure in this work. Rod Walker is a high school student who takes a ten day survival course; at the end of the course they take a gateway to a distant planet. He and the other students are stranded there; they form their own government and civilization. Select an invention:

Ramsbotham Gate - wormhole

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re: Robert Heinlein
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