Solid Geometry

'Icosahedron II' by Richard Sweeney

'Gentlemen,' said Hunter, 'I must ask you to forgive this improper form of address, but I have something to tell you of the utmost importance. I have discovered the plane without a surface.' Amid derisive smiles and gentle bemused laughter, Hunter picked up from the table a large white sheet of paper. With a pocket-knife he made an incision along its surface about three inches long and slightly to one side of its centre. Then he made some rapid, complicated folds and, holding the paper aloft so all could see, he appeared to draw one corner of it through the incision, and as he did so it disappeared.
'Behold, gentlemen,' said Hunter, holding out his empty hands towards the company, 'the plane without a surface.'

from 'Solid Geometry' by Ian McEwan