Shipyards are waterside construction sites where the extraordinary takes shape and where some of the largest tools built by humans help create the biggest machines on earth. But shipyards and ships of today bear little resemblance to those of antiquity. From ancient days to the 18th-century Industrial Revolution to the epic effort performed at Pearl Harbor, we examine the shipyard, and look to its future. Will the craftsmanship and practical knowledge of how to build ships disappear in the 21st century?