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Igneous rocks formed from lava flows of the Archaean era (>2,700 million years ago) are often found to contain disequilibrium-textured crystals characterized by spherulitic, branching or dendritic morphologies that occur in layers near the flow surface. Wow - COLOR!

I loved this article about the theory of a "central command center" to the flow of operations in your house -- and how you should organize it most effectively.