Cecilia Payne-Gaposchkin Quote
Whenever we look in nature we can see spiral forms in the uncurling fern, the snail, the nautilus shell, the hurricane, the stirred cup of coffee, the water that swirls out of a wash bowl. Perhaps we shouldn't be surprised to see spirals in the great star systems whirling in space. Yet they remain a great, intriguing question.
Why Do Galaxies Have a Spiral Form?, Scientific American, Volume 189, Number 3, September 1953 (p. 89)