Democritus on how atoms formed objects

One of Democritus' question was how atoms made objects. He noticed that the world is constantly changing, dying, growing. The worlds flow, therefore atoms must flow. They can't just be still.

Democritus reasoned that atoms join into various combinations, then emit eidôla (composite blobs of atoms) outward, like ripples in water. This atomic radiation is then picked up by us and translated into ideas or sensations.