A multimillion-year-old record of Greenland vegetation and glacial history preserved in sediment beneath 1.4 km of ice at Camp Century. - Christ AJ; Bierman PR; Schaefer JM; Dahl-Jensen D; Steffensen JP; Corbett LB; Peteet DM; Thomas EK; Steig EJ; Rittenour TM; Tison JL; Blard PH; et al. (Proceedings of the National Academy of Sciences of the United States of America, 2021)