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Yet for all its sheer matter—steel, glass, silver, aluminum, copper, ferroconcrete, silicon—the observatory seems to lift off into a mytho-poetic dimension.—
Michael Jones McKean,
The Atlantic,
23 June 2025 Since steel was scarce, the ship was built of ferroconcrete—a frame of metal mesh or steel-alloy rebar to which a concrete mixture was added in layers.—
Courtney Linder,
Popular Mechanics,
10 Mar. 2022