Gather 'round kiddies, and I'll tell you a story about pointy wooden things called pencils. Before the explosion of keyboards and touch screens, people used to use them to do something called writing. On paper.
Now, one MIT chemistry postdoctoral student may have given the old-fashioned pencil a new lease -- though not as something you'd bring to the SAT.
Katherine Mirica and colleagues created a novel type of pencil lead, replacing graphite with a highly compressed powder made of commercially available carbon nanotubes. The resulting newfangled lead can inscribe sensors on any paper surface.
So what's the point?… Read more