A deep dive into the technological progress of today’s smart valves, bearings, brakes, gearboxes and actuators, and what’s next.

Riding lawn mowers vary quite a bit from model to model. There are small rear-engine mowers for yards up to an acre and lawn ...

† Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States ‡ Department of Earth Sciences, Dartmouth College, Hanover, New ...