Historical linguistics examines how languages evolve over time, exploring the processes that drive change and the relationships between languages. This field investigates phonological, morphological, syntactic, and lexical shifts, as well as the social and cultural factors influencing language development. Linguists use various methods to study language history, including the comparative method, internal reconstruction, and computational analysis. These techniques help reconstruct proto-languages, trace language families, and uncover patterns of change, providing insights into human history, culture, and cognition.