Report The Arrival of Siberian Ancestry Connecting the Eastern Baltic to Uralic Speakers further East Graphical Abstract Highlights d Increase in hunter-gatherer ancestry in Bronze Age Eastern Baltic genomes d Genetic input from Siberia to the Eastern Baltic during the transition to Iron Age d Arrival of Siberian ancestry coincides with proposed arrival of Uralic languages d Light eyes, hair, and skin and lactose tolerance become frequent in the Bronze Age Authors Lehti Saag, Margot Laneman, Liivi Varul, ..., Valter Lang, Mait Metspalu, Kristiina Tambets Correspondence lehti.saag@ut.ee (L.S.), kristiina.tambets@ut.ee (K.T.) In Brief Saag et al. present aDNA from the teeth of 33 individuals from the Eastern Baltic dating to 3,200–400 years ago. They find that the Bronze Age in the Eastern Baltic brings an increase in hunter-gatherer ancestry and the Iron Age delivers genetic input from Siberia that also connects modern European Uralic speakers to those living much further east. Bronze Age Iron Age Steppe Early Farmer Eur. hunter-gatherer Siberian Y chromosome Autosomes Saag et al., 2019, Current Biology 29, 1701–1711 May 20, 2019 ª 2019 Elsevier Ltd. https://doi.org/10.1016/j.cub.2019.04.026