[ane]

Your sentence makes it sound like Yeniseian languages are language isolates, but what is absolutely astounding is that Yeniseian languages seem to form a family with the Na-Dene languages of North America. Two language families separated by the Bering strait over 15000 years ago!

[alephnerd]

Yep! And it's absolutely amazing! The distant brethren of Navajo basically destroyed the Han Empire 2000 years ago.