The sea urchin's intricate mouth and teeth are the model for a claw-like device developed by a team of engineers and marine biologists to sample sediments on other planets, such as Mars. The sea ...

Invention of the gear-hobbing process about 150 years ago revolutionized not only gear fabrication, but also gear design. Basically, a hob or shaper cutter traverses the gear blank to generate teeth.

A team of New York University scientists has created a gear mechanism that relies on fluids to generate rotation. The invention holds potential for a new generation of mechanical devices that offer ...