It uses what's called Shape Memory Alloy technology, so as each pin expands, it remembers and contracts back to its original flat shape.

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If you dropped it, it would crumble flat but regain its shape flawlessly the moment you picked it up.

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The buildings, with a circular shape and a flat roof, were made of mud, sun-dried mudbricks and stone.

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By using the latest in rear-projection technology, a high resolution, colour 3D-like holographic image is projected onto a flat two-dimensional sheet of acrylic in the shape of a woman.

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There was no visible wood grain in the print, and its shape indicated it was taken from a curved surface, not a flat one.

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Rather than the flat bottoms that characterize most traditional boathouses, the Pearl would have a bobber-like shape.

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