Welcome to the Voice of America’s News Words.This news word is from the Crossrail project,a train tunnel now being built in London,England.Artifact.The underground project to connect Heathrow Airport to the financial district has uncovered more than 10,000 artifacts.One special artifact is a bronze medallion from the year 245 AD.An artifact is a simple object made and used by people in the past.In science,an artifact is a substance or structure formed by humans,not nature.

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