Over 2,500 years ago, Greek philosophers debated whether the nature of reality was impermanence or constant change. Heraclitus was the champion of change, pointing to the march of the seasons and the ebb and flow of the tides. In contrast, Parmenides, a near-contemporary of Heraclitus, claimed that change was illusory and constancy was the rule. Modern physics has found subatomic examples that support both ways of thinking. For example, the electrons found in your atoms have been unchanged... Read this story
