Symmetry

We are familiar with three forms of symmetry, exhibited approximately in many natural and manufactured situations. They are
translational, reflectional, and rotational
symmetry.
Hermann Weyl's wonderful book Symmetry remains the best reference, though it places some mathematical demands on the reader.
Less familiar is symmetry under magnification: zooming in on an object leaves the shape approximately unaltered.
Clouds: the smaller clouds are smaller copies of the larger cloud.

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