Under What circumstances might a scientific theory be changed?

A scientific theory may be changed when new empirical evidence contradicts the existing framework, demonstrating that it cannot adequately explain observed phenomena. Advances in technology or methodology can also lead to new insights that challenge established theories. Additionally, if a theory fails to make accurate predictions or does not integrate well with other established scientific knowledge, it may be revised or replaced. Ultimately, the scientific process is dynamic, allowing for theories to evolve as our understanding of the natural world deepens.