It is the begining and ending of everything. Nature tends to grow many of her plants with a spiral. Infinitely small and infinitely large, which is the difference? Two paths lead to the same destination… the infinite. A matrix from the atom to galaxy, the spiral! In mathematics, a spiral is a curve which emanates from a central point, getting progressively farther away as it revolves around the point. The spiral plays a specific role in symbolism, and appears in megalithic art, notably in the Newgrange tomb or in many Galician petroglyphs such as the one in Mogor. See, for example, the triple spiral. The spiral is also found in structures as small as the double helix structure of DNA and as large as the spiral structure of a galaxy. Christopher Wren observed that many shells form a logarithmic spiral. Jan Swammerdam observed the common mathematical characteristics of a wide range of shells from Helix to Spiral and Henry Nottidge Moseley described the mathematics of univalve shells. D’Arcy Wentworth Thompson’s On Growth and Form gives extensive treatment to these spirals. He describes how shells are formed by rotating a closed curve around a fixed axis, the shape of the curve remains fixed but its size grows in a geometric progression. In some shell such as Nautilus and ammonites the generating curve revolves in a plane perpendicular to the axis and the shell will form a planar discoid shape. G.N.
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