One of the oldest and most complete skeletons 'Kennewick Man' found in North America will be given back to American Indian tribes in Washington State for reburial.

According to Daily Mail, President Barrack Obama signed a bill Monday with a provision requiring the ancient bones known as Kennewick Man be returned within 90 days.

The experts estimate the remains first found in 1996 on federal land near the Columbia River are at least 8,400 years old.

The Kennewick Man was about 40 years old at the time of death, but the cause of the death remains a mystery. According to CTV News, he lived among big-game animals such as deer and bighorn sheep. He is primarily consumed fish and marine mammals and relied on glaciers melt waters in rivers.

The Skelton is stored at the Burke Museum of National History and culture in Seattle. The 'Kennewick Man' was only distantly related to populations other than Native Americans, such as Ainu of Japan or people from Polynesia.

The discovery has triggered a lengthy legal fight between tribes and scientists over whether the bones should be buried immediately or studied.

The Skelton transfer from the US Army Corps of Engineers to the state archaeology department, which will get it to the tribes. The army with the state organization transfer the remains in an expedited fashion, reported by J Gas kill, Chief Public Official of Army in Portland.

But the Army did not clarify where the bones will go. In a statement, they clarified "we don't know where the bones are going yet".

However, one of the tribes that have pushed to rebury was Yakama Nation. JoDe Goudy, chairman of the Yakama Tribal Council said," It took 20 years for the tribes to fight for return the bones"

U.S. Sen. Patty Murray first introduced for Water Infrastructure Improvements for the Nation Act. A provision of the act was to return Kennewick Man to the tribes of the Columbia River Plateau.

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