“This and That” is an occasional series of paired observations. See past “This and That” posts here. – Ed.
Today: Flying

Yves Klein’s Leap into the Void, 1960. Image: © Yves Klein, ADAGP, Paris; Photo: Shunk-Kender © Roy Lichtenstein Foundation

A photograph by artist Bucky Miller
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No matter how original, innovative or crazy your idea, someone else is also working on that idea. Furthermore, they are using notation very similar to yours. – Bruce J. MacLennan