Enjoy this lecture, “The Peopling of the Americas and the Dene-Yeniseian Connection” by Dr. Edward Vadja who visited, lived among and studied the very remote Ket people in far northern Russia. The Ket are ancestral to the Na-Dene and Athabaskan people in the Americas and live so remotely that not even the Russians could penetrate that region to build concentration camps. Today, there are only about 1200 Ket people in total, of which there are only about 50 Native Ket speakers left, the rest speaking Russian. They share genetics, haplogroup Q and a common ancestral language with Native American people along with other similarities.
Native Heritage Project 
Thank you for all your great posts!