In February 2008, a proposal connecting Na-Dene (excluding Haida) to the Yeniseian languages of central Siberia into a Dené–Yeniseian family was published and well-received by a number of linguists.[1] It was proposed in a 2014 paper that the Na-Dene languages of North America and the Yeniseian languages of Siberia had a common origin in a language spoken in Beringia, between the two continents.[2]