For the first time, researchers have used high-speed laser writing to create lines spaced just 100 nm apart on a glass substrate. The optimized printing approach could enable super-resolution 3D ...

“It makes drawings in the air, following [real] drawings [which] it scans with photo-cells… Plastic comes out of the end of the drawing arm and hardens as it comes.” So wrote Murray Leinster, an ...

Perhaps the humble block and tackle — multiple parallel pulleys to reduce the effort of lifting — is not such a common sight as it once was in this age of hydraulic loaders, but it remains a useful ...