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A mile away there's an ample deposit of graphite carbon. Thus, there exists a complete local source of hydrogen, oxygen and carbon, ideal for synthesizing various hydrocarbonic chemicals or making complicated polyethylene materials such as stellene, so useful in space. Lead, too, is not very far off. Silicon is, of course, available everywhere.
So how did they turn out? Made of stellene, mostly an improved form of polyethylene almost the same stuff as a weather balloon." "A few millimeters thick, light, perfectly flexible when deflated," Nelsen added. "Cut out and cement your bubb together in any shape you choose.
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