The term "known" refers to information or facts that are recognized, understood, or acknowledged by individuals or groups. It indicates that something is established or accepted within a particular context, such as scientific knowledge, historical events, or cultural practices. In various fields, such as science or history, what is considered "known" can change over time as new discoveries are made or perspectives shift. For example, theories in physics may evolve with new evidence, altering what is accepted as "known" in that discipline.