The 8 Best Robot Vacuums Withstood Every Mess We Threw at Them

We put several robot vacuums from Roborock, Eufy, Dreame, and more through a series of mess tests to see which stood out.

Manual Transmissions Aren’t Dead. Some U.S. Buyers Are Choosing Them More

Data reveals that while many manuals are declining, several models, including the Subaru BRZ, still see strong buyer ...

Groundbreaking water-driven gear works without teeth or direct contact

Scientists at New York University and NYU Shanghai have developed a new kind of gear that works without teeth or direct ...

Liquid gears could challenge 5,000 years of mechanical engineering

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, ...
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This Touchless Gear System Uses Fluid Dynamics to Transfer Power and Rotation Without Any Teeth

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