Democritus developed systems that made change possible by showing that it does not require that something should come from nothing. There are multiple unchanging material particles, indivisible particles, which persist and only rearrange themselves to form the changing world of appearances. These unchanging indivisible material particles are known as atoms. There are two fundamentally different kinds of realities composing the natural world, atoms and void. Atoms move about in an infinite void, connecting and disconnecting from eachothere, by means of tiny hooks. Atoms are also unchangeable, ungenerated and indestructible. Also, atoms keep properties of the senses, meaning since salt is very salty and sharp the atoms that make up salt may look like shards and in sugar the atoms may look rounded.