Can theories change or evolve over time?

Yes, theories can change and evolve over time. The nature of scientific inquiry is such that theories are not set in stone but are subject to revision and refinement based on new evidence and findings. As our understanding of the world and its phenomena deepens, theories may need to be modified or even replaced to align with these new understandings. Scientific progress often involves challenging existing theories and proposing new ones that better explain observed phenomena. For example, in the field of biology, Charles Darwin's theory of evolution has undergone numerous refinements and adaptations since its inception as our knowledge of genetics and natural selection has expanded. Therefore, theories are dynamic and adapt to accommodate new data, leading to a more accurate understanding of the natural world.