Add Yahoo as a preferred source to see more of our stories on Google. Copper and brass are easily confused as they look so similar, but it's their color that distinguishes them. Copper has distinct ...

One idea was that they made large copper pieces, like ceremonial breastplates, by "laminating" sheets of copper together through a hammering technique. Deymier-Black said that the lamination could not ...

Researchers ditched many of their high-tech tools and turned to large stones, fire and some old-fashioned elbow grease to recreate techniques used by Native American coppersmiths who lived more than ...