Which innovative building material was first used by Herzog & de Meuron in their 2008 Beijing National Stadium (Bird's Nest) design to create its distinctive aesthetic while meeting stringent seismic requirements?

The architecture industry constantly evolves with innovative building materials that transform design possibilities. These product innovations have changed how architects approach sustainability, aesthetics, and structural engineering. This poll tests your knowledge about a groundbreaking product that revolutionized architectural facades. How familiar are you with the cutting-edge materials that have reshaped modern building design?

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Self-healing concrete with bacterial spores
ETFE (Ethylene Tetrafluoroethylene) pneumatic cushions
Weathering steel (Cor-ten) in an interwoven structural pattern
Photocatalytic titanium dioxide facade panels