In archaeology, a hammerstone is a hard cobble used to strike off lithic flakes from a lump of tool stone during the process of lithic reduction. The hammerstone is a rather universal stone tool which appeared early in most regions of the world including Europe, India and North America.
U.S. Files Complaints With WTO Against Trading Partners. The U.S. fired back at lawsuits other countries have filed with the World Trade Organization over Trump steel and aluminum tariffs, escalating a trade dispute with some of America's closest allies.