There are some inventions that look completely pointless to the untrained eye: who would ever need a motorized garbage can, an electric pencil sharpener or a battery-powered eraser? Quite often ...

This likely hints towards a new eraser feature or update in the upcoming Apple Pencil model. This new functionality could be placed at the top of the drawing stylus, much like a regular pencil.

The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...

It can’t have been long after the invention of the pencil that people realised they occasionally made mistakes while using it. Prior to the invention of the rubber eraser we know today ...