College GameDay' great Lee Corso is always filmed with a pencil in hand, so what's the deal? It's kind of a funny story.

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 number 2. Harder lead makes a lighter mark and softer lead makes ...

The iPad manufacturer's stylus looks white and neutral. A US custom specialist is now coloring the Apple Pencil in seven colors.

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 ...