Meet the inventor of the phonograph, the motion picture camera, and the long-lasting, practical electric light bulb, Thomas Edison.

A brief biography of African-American inventor, Lewis Latimer. Read about his association with both Hiram Maxim and Thomas Edison in developing the incandescent light bulb. This is a transcript of an accompanying radio broadcast.

An early history and biographies of the most prominent scientists involved in developing the main sources of energy used in the twentieth century.