Piezoelectricity is energy produced from pressure. The energy gets generated when an automobile, a truck or a train passes over a surface in which piezoelectric devices are embedded. Even a sidewalk or dance floor can be outfitted with such devices. The cigarette lighter in an automob

Until about six months ago I had a model train set in my basement. We were renovating and I finally parted with my world of miniature locomotives and boxcars. They found a good home when we had a garage sale. Trains have always fascinated me because they are such an expression of our

The 20th century was the age of the internal combustion engine just as the 19th was the age of steam. Humanity went from horse and buggy, sail and balloons to the development of railway networks, automobiles, engine-driven ships, airplanes and rockets. The world became a lot smaller p