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Also known as 'Bucky balls' (after the American architect Buckminster Fuller who was known for his use of geodesic domes) they are built out of a number of 'Pentagon-Hexagon Zig Zag (PHiZZ) units' each made from a square piece of coloured paper.
They have the same geometric form as a Fullerene (carbon based molecules, also named after Fuller) which are used to build structures in Nanotechnology.
More images of the installation on my website