Globe and Mail: In a dusty yard under a blistering August sun, Rover was hard at work, lifting 20-kilogram solar panels off a stack and installing them, one by one, into a concrete track. A few yards away, Rover's companion, Spot, moved along a row of panels, washing away months of grit, then squeegeeing them dry.
But despite the heat and monotony - an alternative-energy version of lather-rinse-repeat - neither Rover nor Spot broke a sweat or uttered a complaint. They could have kept at it all day.
That is...