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#equiangular spiral #spira mirabilis #constant angle #math spiral #polar coordinates #self-similar

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#matryoshka #nesting dolls #nested structure #self-similar #physical recursion

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#fractal #self-similar #nature fractal

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#fractal #self-similar #nested skull #infinite skull #skull within skull

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#droste effect #self-reference #picture-in-picture #visual recursion #self-similar