From early cave painters to Pablo Picasso to Roberto Longo, artists have long loved the expressive potential of a soft charcoal pencil or crayon. Each sweep of charcoal offers intense black color and ...

The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. Artist Christoph ...

Take a look at this portrait of Barack Obama. "OK," you're thinking, "it's pretty good, but nothing special. It's just another portrait of the new US President, drawn in pencil. Or is that ballpoint?