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- Negative entropy: according to Schrodinger negative entropy is the amount of order that an organism "sucks from its environment" as its lives or "avoids decay to thermodynamical equilibrium or of maximum entropy".
- Quantum Graphity: Quantum graphity conceives of the universe as a network—a graph—of elementary grains. It begins in a highly energized, fully interconnected state, with every grain linked to every other grain. You could go from any grain to any other grain in one hop, without passing through any intermediate points, and you couldn’t subdivide the universe into separate chunks. Such a universe couldn’t be described as spatial. Then the network loses energy, prunes its links, and transforms into a regular grid, as if condensing from a chaotic gas into a orderly crystalline structure. Some grains are close together, the rest far apart, so the universe has a notion of distance: it acquires the properties of a system existing in space. The theory is very bare-bones, but offers a plausible scenario for how the space we experience might emerge from a deeper reality. (George Musser)
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- Symmetry: "relation of parts, proportion," from Greek symmetria "agreement in dimensions, due proportion, arrangement," from symmetros "having a common measure, even, proportionate," from assimilated form of syn- "together" (see syn-) + metron "meter" (see meter (n.2)). Meaning "harmonic arrangement of parts" first recorded 1590s.