As one of the oldest components of human engineering, gears have driven civilization for ...

Engineers reinvent the 5,000-year-old gear using fluids instead of solid teeth.

Gears are everywhere - from clocks and cars to robots and wind turbines. For more than 30 years, researchers have been trying to create even smaller gears in order to construct micro-engines. But ...

The study, published January 13 in Physical Review Letters, replaces the metal or plastic cogs of conventional gears with controlled flows of liquid. In their experiments, ...