Building a wall by precisely stacking randomly shaped boulders could almost be the definition of hard work – both physically and mentally. It's the sort of thing we might want robots to do one day, so it should come as no surprise that one has in fact just done it.
The "robot" is named HEAP (Hydraulic Excavator for an Autonomous Purpose), and it's actually a 12-ton Menzi Muck M545...
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