Atom (paramanu) The idea of a fundamental particle (maybe unit) seems to be originated in Greek and Indian philosophy independently. In Greek philosophy, [Democritus](democritus) suggested the idea of atom around 400-300 BCE, while in [Indian philosophy](indianPhilosophy), It was [Kanada](kanada) who proposed the idea of paramanu (Atom) around 600-200 BCE.\ \ However, both ideas of atom are very different. [Democritus's](democritus) atom has no qualitative differences, while [Kanada's](kanada) atom differed both quantitatively and qualitatively. See also: - [The Conception of the Atom in Greek and Indian Physics](https://arxiv.org/pdf/0712.0764)