Can you solve it? Do you have the mind of an engineer?
by Alex Bellos from on (#628WX)
Baffling bridges and strange structures
UPDATE: You can read the answers here
If you have ever strolled along the Macclesfield canal you may have walked across a snake bridge', like the one above, in which one side of the towpath spirals backward.
The question is: why did they build bridges like this?
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