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sun+stone was inspired by Native American rock art -- in particular, a specific spiral petroglyph found inside the Tempe, Arizona city limits.

Believed to be a prehistoric calendar, this carving was sited in such a way that a shadow covers exactly half of the spiral form on the summer solstice. There are similar sites throughout the southwest.

The image of the sun casting a shadow in a controlled way on a carving in solid rock created by a once thriving culture of desert farmers over a thousand years ago was inspirational: leading to a study of pueblo Indian cultures and their dwellings, and, ultimately, to a master's thesis using modern computer modeling software to analyze the thermal efficiency of four stages in the evolution of pueblo architecture.

If a stone age culture could develop structures to moderate the effects of the intense desert climate in the summer and provide warmth in the winter using only passive thermal principles, then surely we can learn to build in harmony with our environment today.