The escalator was invented over a hundred years ago (in the late 1800s, believe it or not) and since then they've always gone in a straight line; but now, thanks to Jack Levy, an aesthetic upgrade has been developed.
Levy, City University London Emeritus Professor of Mechanical Engineering, has patented the Levytator, an escalator that can follow curves by means of specially-designed steps that recall the sections of conveyor belt you see at airport baggage claims.
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