A good description of the inventions and life of this bright and ambitious man. As inventor of the light bulb, phonograph, movie camera and many others, Edison lived a very inspiring life. In Spanish.

A detailed biography of Granville T. Woods, who was known as "the Black Edison" because of his many inventions. He is best known for greatly improving the safety of railroads by his invention of the Multiplex Railway Telegraph.

Here is a thorough biography of inventor Granville T. Woods, who is credited with improving railway safety for bot the trains and trainmen. Find out what concepts in railroad safety are still being used today.