Gold Shaw Farm uncovers the unusual history behind New England’s iconic stone walls.

Advertisement Article continues below this ad Stone ... Fences. Today, scientists are using a technique called LiDAR, or light detection and ranging, to measure and map stone walls across New England.

Stone walls can be found here and there in other states, but only in New England are they nearly ubiquitous. That’s due to a regionally unique combination of hard crystalline bedrock ...