Definition
Democritus (c. 460 – c. 370 BC) was an ancient Greek philosopher, best known for his atomic theory. He proposed that all matter is composed of indivisible, fundamental particles called 'atoms.' Democritus believed atoms were eternal, unchanging, and varied in shape and size. This concept revolutionized scientific thought. His theories laid the groundwork for modern atomic theory. Think of him as an early scientist trying to understand the building blocks of everything. Democritus represents a crucial figure in the history of science and philosophy.