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It may not look it, but all the glass on Earth is flowing downwards under the relentless drag of gravity. Remove a pane of really old glass from the w...more

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I refer of course to the soaring wonder of the age known as the Eiffel Tower. Never in history has a structure been more technologically advanced, mat...more

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Less than a decade after the Great Exhibition, iron as a structural material was finished—which makes it slightly odd that the most iconic structure o...more