How on Earth?

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I walked around and around this today, looking for signs of a rod or bar or something that keeps this thing standing upright. I can't for the life of me see how it was done. It's part art, part engineering.

Also, since I seem to be in a photographic mood, I wanted to pass this along. I stumbled upon this yesterday as I was hitting the "next blog" button on the Blogger toolbar. It's called Dreaming in Metaphors, and whoever this is behind the camera has a wonderful eye. I've put it on my sidebar under "Photos," but thought I'd point it out as well. Enjoy.