In 1959, Bill Smith was an apprentice learning how to build the wooden patterns that foundries use to crank out everything from cast-iron cornbread skillets to the steel wheels on U.S. Army tanks.

Everyone is talking about green roofs these days, but honestly, what do we really know about them? We understand the environmental angle to a degree. At the same time, what exactly does it take to ...

Men poured molten metal into sand casts at Waterville Iron Works — which was perched on the banks of the Kennebec River — in the 1800s and early 1900s. They manufactured gears, parts for stoves, plows ...