cell phones

I knew I had a problem with my Facebook addiction when I kept thinking of last weekend’s camping trip as a series of status reports:

Wendy Worrall Redal

… swore she would not camp in a tent in the rain again, and here she is.

What if you could generate energy simply by walking? Or by boogie-ing on a dance floor? Or by driving your car on any old road?

That’s the premise behind piezoelectricity. Certain crystals or ceramic materials can generate an electric charge simply by having stress applied to them — the stress, for example, of a person walking on or a car driving over them.