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https://en.wikipedia.org/wiki/Slidewalk https://en.wikipedia.org/wiki/Slidewalk Several of Heinlein's other Future History books and stories reference the roll

by graywh 12y ago

https://en.wikipedia.org/wiki/Slidewalk https://en.wikipedia.org/wiki/Slidewalk Several of Heinlein's other Future History books and stories reference the rolling roads.