the zipper 
Karlatornet is not only the highest building in Scandinavia. It must be the most satisfying one too! Got a nice view of those zipper elevators on our walk the other day👖
Happy friday! 
I'm so fascinated by the shape of the Shanghai financial center and what it can do. Happy weekend everyone!
the colossal trammel 
The trammel of Archimedes is most often called a useless machine. Well, the romans begs to differ. It was used to draw the perfect ellipse of Colosseum and I hear a modern interpretation is on display there now. Thanks to videvostock for capturing it.
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