The field of neuropsychology -- the applied form of neuroscience -- is now offering an emerging consciousness about the brain's inner workings.

CNN: Manage your brain -- it's your most important asset

Obviously an eyelid-like shutter mechanism would be too large and complicated for something as small as a print head, so an electrical field is applied instead to keep the film spread thin.

ENGADGET: Alt-week 7.28.12: social mathematics, Pluto's moons and humans-on-a-chip

When an electric field is applied to a microcapsule, the pigment particles within it move, turning one side of the capsule white and the other black.

ECONOMIST: REPORTS

That means that the beads will turn and turn about if an electrical field is applied to them.

ECONOMIST: Showing off