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Ke Bi and colleagues relied on historical DNA (hDNA)—genomic data incidentally preserved in specimens housed in natural history collections—to investigate the evolutionary trajectory of the alpine chipmunk (Tamias alpinus). Although this approach offers unique benefits, such as the ability to contrast historical genomic data with present-day data, it remains relatively underutilized because archival specimens are sometimes stored in ways that compromise DNA quality, a situation not easily remediable under current methodological paradigms and with extant DNA extraction and analysis technologies.