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flooring

An example of an error bar tiling formed from an equilateral octagon in three repetitions

Real tiling with self-similar triangles

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Two endothelial cells in the liver. The cell on the right expresses high levels of the Wnt2 gene (red), and the cell on the left - high levels of the Dkk3 gene, which suppresses Wnt (green)

Friend brings a friend

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