Computer science researchers at Technion--Israel Institute of Technology found that they could design physical models of that resemble M.C. Escher's complex, impossible objects--provided that you look at them from the right perspective. They used a 3D printer to build them, such as the above model of Belvedere.
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Two years later, she was asking me if I knew where she could buy a whole chicken. Her usual grocery store had ceased selling them whole, only in parts.
I've plucked chickens, butchered sheep, cattle and deer. Caught and gutted fish... and fried 'em all up in a pan, and consider these skills valuable, in that I can never forget that something died to become my food. I'm concerned about what happens to us in this culture or any other, when we no longer make that connection.