Democritus believed that if he continuously cut stone, into smaller and smaller pieces, at some point there would be a piece so small it would be invisible,therefore it would be impossible to cut again. He called these pieces of matter "atomos"
Aristotle rejected Democritus's theory of the atom. His theory was that a mass of incomprehensible size was everywhere, he called this "Hyle". There were no separate particles for any material, it was all one.
Everything is composed of “atoms”, which are physically, but not geometrically, indivisible Between atoms, there lies empty space Atoms are indestructible Atoms have always been, and always will be, in motion There are an infinite number of atoms, and kinds of atoms, which differ in shape, and size.