DNA analysis of a 30,000-year-old Urocitellus glacialis from northeastern Siberia reveals phylogenetic relationships between ancient and present-day arctic ground squirrels. - Faerman M; Bar-Gal GK; Boaretto E; Boeskorov GG; Dokuchaev NE; Ermakov OA; Golenishchev FN; Gubin SV; Mintz E; Simonov E; Surin VL; Titov SV; et al. (Scientific reports, 2017)