The Bactra Review   The Self-Made Tapestry

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That the BZ reagant can be made ``perfectly stable in its uniform quiescence,'' yet still be able to form spirals when provoked, is a surprisingly under-appreciated point, though it was made by Arthur Winfree a quarter of a century ago: A. T. Winfree, ``Spiral Waves of Chemical Activity,'' Science (1972) 175: 634--636. The phrase quoted is from Winfree's When Time Breaks Down (see the first footnote).