Panel 3 in Maltravieso Cave showing 3 hand stencils (centre right, centre top and top left). One has been dated to at least 66,000 years ago and must have been made by a Neanderthal (colour enhanced).

Hand stencils – produced by throwing or blowing pigment at hands placed against a wall – are among the most iconic forms of prehistoric rock art. Found in caves across Europe and Asia ...

If you are soldering with paste, a stencil makes life a lot easier. Sure, you can apply paste by hand with a syringe, but a modern PCB might have hundreds or even thousands of pads. Like a lot of ...

Painting from three cave sites, a red linear motif in Cave of La Pasiega, a hand stencil in Maltravieso Cave, and red-painted speleothems in Ardales Cave, was found to be more than 64,000 years old.

It’s not exactly trivial to cut them out by hand. [Juan] recently learned a new trick to make cutting solder stencils a less painful process. He uses a laser cutter to cut Mylar sheets into ...