An autonomous robot with a large gripper can transform a pile of boulders into huge stone walls without mortar – learning on its own how to place each irregularly-shaped stone as the next ...

Before you start building a stone ... wall. Site preparation is crucial for ensuring the longevity of your retaining wall.

Next, the group saw a typical pasture stone wall. “But it was different because there were large hickories along it, and these large hickories are uncommon in Concord,” Forman said.

GEERSEN: It's usually small stones, but then at some places where we have a large stone, the direction of the wall changes. DANIEL: Geersen didn't know how such a structure could have formed.