
Democritus
c. 460–370 BCEPre-Socratic Greek philosopher from Abdera. He is considered one of the first to propose an atomic theory of matter, many centuries before modern science confirmed that atoms exist.
He proposed that all matter is made of indivisible, invisible particles called atoms that move through empty space, and that atoms differ in shape, size and position — which explains the variety of the world.
His atomist vision was the seed of modern physics and, ultimately, of quantum physics. It marks the beginning of the rational, naturalistic attempt to understand the fundamental structure of reality.












