Kanada (कणाद), also known as Kashyapa, Ulūka, Kananda, and Kanabhuk, was an ancient Indian natural scientist and philosopher who founded the Vaisheshika school of Indian philosophy that also represents the earliest Indian physics.
Estimated to have lived sometime between the 6th century to 2nd century BCE, little is known about his life. His traditional name “Kanada” means “atom eater”, and he is known for developing the foundations of an atomistic approach to physics and philosophy in the Sanskrit text Vaiśeṣika Sūtra.His text is also known as Kanada Sutras, or Aphorisms of Kanada.
The school founded by Kanada explains the creation and existence of the universe by proposing an atomistic theory, applying logic and realism, and is one of the earliest known systematic realist ontologies in human history.
Kanada suggested that everything can be subdivided, but this subdivision cannot go on forever, and there must be smallest entities (parmanu) that cannot be divided, that are eternal, that aggregate in different ways to yield complex substances and bodies with a unique identity, a process that involves heat, and this is the basis for all material existence.
He used these ideas with the concept of Atman (soul, Self) to develop a non-theistic means to moksha. If viewed from the prism of physics, his ideas imply a clear role for the observer is independent of the system being studied. Kanada’s ideas were influential on other schools of Hinduism, and over its history became closely associated with the Nyaya school of Hindu philosophy.