Bronze artifacts discovered in a 1,000-year-old house in Alaska suggest trade was occurring between East Asia and the New World centuries before the voyages of Columbus.

The new discoveries, combined with other finds made over the past 100 years, suggest trade items and ideas were reaching Alaska from East Asian civilizations well before Christopher Columbus arrived in the Caribbean Sea in 1492 archaeologists said.

"We're seeing the interactions, indirect as they are, with these so-called 'high civilizations' of China, Korea or Yakutia," a region in Russia, Mason said.

The Rising Whale discoveries include two bronze artifacts, one of which may have originally been used as a buckle or fastener. It has a piece of leather on it thatradiocarbondates to around A.D. 600 (more tests will take place in the future). The other bronze artifact may have been used as a whistle.

Bronze-working had not been developed at this time in Alaska, so archaeologists think the artifacts would have been manufactured in China, Korea or Yakutia, and made their way to Alaska through trade routes.

Also inside that house, researchers found the remains of obsidian artifacts, which have a chemical signature that indicates the obsidian is from the Anadyr River valley in Russia.

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