Tracing ancient Asia-America migration in language

Kets are a living linguistic fossil. Several hundred strong and dwindling, they inhabit swampy, mosquito-infested areas along the Yenisei, a mighty central Siberian river whose bright-blue waters flow into the Arctic Ocean. Thousands of years ago, reindeer pastoralists and horse herders pressed Kets to flee their motherland between Mongolia and Lake Baikal northwards to the world's largest forest, the Siberian taiga.