. "Atomism (from Greek \u1F04\u03C4\u03BF\u03BC\u03BF\u03BD, atomon, i.e. \"uncuttable\", \"indivisible\") is a natural philosophy that developed in several ancient traditions. The atomists theorized that nature consists of two fundamental principles: atom and void. Unlike their modern scientific namesake in atomic theory, philosophical atoms come in an infinite variety of shapes and sizes, each indestructible, immutable and surrounded by a void where they collide with the others or hook together forming a cluster."@en . . .