Democritus' Idea of the Atom 

Democritus, an ancient Greek philosopher, proposed that all matter is composed of tiny, indivisible particles called "atomos," meaning "indivisible" or "uncuttable."

These atoms were considered the fundamental building blocks of all substances, and he believed they were eternal and in constant motion through empty space.

Democritus argued that changes in matter resulted from the rearrangement of these atoms rather than the creation or destruction of new substances.

He suggested that various properties of matter, such as taste, color, and odor, were due to differences in the size, shape, and arrangement of these atoms.

Despite being largely speculative and lacking experimental evidence, Democritus' atomic ideas served as an early conceptual foundation for the modern atomic theory, inspiring later developments in the fields of chemistry and physics.