empty space
Leucippus follows the Ionian tradition for the general shape of his cosmos, and contradicts the central axiom of the Eleatics by asserting that Non-being, empty-space, exists just as much as Being. But he reduces matter to minute particles which resemble the Eleatic One in being indivisible (atotna), indestructible, and qualitatively neutral; they differ from one another only in shape and orientation. Different rearrangements of them produce the effect of changeable qualities such as colour, heat, hardness, etc. (Boardman, 1986)