Analysis of Human Sequence Data Reveals Two Pulses of Archaic Denisovan Admixture Browning, Sharon R. ; Browning, Brian L. ; Zhou, Ying ; Tucci, Serena ; Akey, Joshua M. Abstract Publication: Cell Pub Date: March 2018 DOI: 10.1016/j.cell.2018.02.031 Bibcode: 2018Cell..173...53B