What is a pontoon bridge? History of science
A pontoon bridge from the Column of Marcus Aurelius, in Rome A pontoon bridge is a temporary bridge that you make by lining up a lot of boats crossways across the river, [...]
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09, 2017
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06, 2017
Sui Dynasty architecture – Medieval China
Anji Bridge, China (600s AD) Under the Sui Dynasty, in the 600s AD, people in China built this beautiful bridge. The bridge shows the ideas of symmetry and balance that [...]
