Geodesic dome

The Montreal Biosphere, formerly the American Pavilion of Expo 67, by R. Buckminster Fuller, on Saint Helen's Island, Montreal, Quebec

A geodesic dome is a hemispherical thin-shell structure (lattice-shell) based on a geodesic polyhedron. The rigid triangular elements of the dome distribute stress throughout the structure, making geodesic domes able to withstand very heavy loads for their size.

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