Dene–Yeniseian languages
Dene–Yeniseian (, dih-NAY YEN-ih-SAY-ən) is a proposed language family consisting of the Yeniseian languages of central Siberia and the Na-Dene languages of northwestern North America. Reception among experts has been somewhat favorable; thus, Dene–Yeniseian has been called "the first demonstration of a genealogical link between Old World and New World language families that meets the standards of traditional comparative-historical linguistics".