In 1939, a robot dog was killed while chasing a car. Really. Sometimes you stumble across a piece of history that is too good not to follow up on. Sparko, the robot dog, is one such piece of history. Prepared for the World's Fair in 1939, he got out of his pen, chased a car, and was killed. No fooling. Androids may dream of electronic sheep, but people have dreamed, for decades, of electronic dogs. Robots, a threatening concept, became much less frightening when put in the form of man's best friend. This relationship turned out quite satisfying for people...