engineering 
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5/10/2020
Spiritualism and Suspension Bridges: John Roebling and a Biographer's Sympathy for the Weird 19th Century
by Richard Haw
A biographer of Brooklyn Bridge designer John Roebling expected to write about a genius. He also ended up writing about a complete weirdo, and how one man could be both.
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SOURCE: The New Scientist
11-4-13
Forbidden City builders chose ice sledge over wheels
Chinese engineers used an ice road to drag stones to build the Forbidden City.
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