Stone by Stone

"There once may have been 240,000 miles of stone walls in America's northeast, more than the distance to the Moon. They took three billion man hours to build. And even though most of them are crumbling today, they contain within them a magnificent scientific and human story - if you know what to look for.". "Stone walls tell nothing less than the story of how New England was formed, and in Robert Thorson's Stone by Stone they live and breathe. "The stone wall is the key that links the natural history and human history of New England," Thorson writes. Millions of years ago, New England's…