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THE YUKON RIVER
The Yukon River has many bluffs and cliffs along the river. The Yukon is one of the mightiest rivers in the world. The Yukon River flows through Canada and the United States. There used to be gold in the Yukon River. You can travel fromYukon Whitehorse. to Dawson City. where you can visit many areas where the gold rush took place. The Yukon River starts in Canada and ends inAlaska. The Yukon River is the third largest in North America.
YAHGANS 
The Yahgans are called Yahganabis in thier language. The Yahgans have their language that is called Yagnobizivock. The Yahgans have lived in 22 villages and the banks of river Yahgnob, in the middle of Tadzhikitam and the far reaches of river Zheran shan. The lower villages are located at about 2,500 metres above the sea level. A number of families also live in the valley of the river Harangom. It is recorded that in the last half of the last century the Yahgans had to move southward because of shortage of land. By the end of the 1920's a part of them had become Tadhzik speakers. Even then, the Yahgans - Tadhzik mixed language was used in Piskon.
YUHYT 
The Eskimos living in the northeastern Siberia call themseleves Yuhyt, Yupikty,or Yupik.Yupik people aren't widely spread. At different times, these people have been known by other names. In the 17th century when Eskimos were not yet distinguished from the coastal Chukchi, they were called the Sadamentary Chuckchi,refering because of their way of life. The 19th century explorers called themseleves Onkilon.