Low-friction, high-stiffness ball guides support on one rail (top) or two (bottom). The trade-offs for this performance are higher cost and more noise. The shortest path between two points is a ...

To fully appreciate the chief advantages of linear motors, it is helpful to compare them to ballscrews, another high-precision rotary-to-linear transmission system. Although typical ballscrews are ...

Over the past century, archaeologists have uncovered more than 1,600 Proto-Elamite inscriptions, but only about 43 in Linear Elamite, scattered widely across Iran. Illustration by Meilan Solly / ...