How Did Thomas Edison Changed Over The Years

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As we all know when a baby gets its motor skills(s)he is learning how to crawl.Then after (s)he gets out of the phase of crarw they learn out to walk then run. All things evolve into newer things, sometimes better and sometimes worst. Thomas edison did just this but for him his invention evolved over they years. Most people know Thomas edison for his telegram and telephone invention but another one of his big inventions that he had was the Phonogram.
The phonogram was made 1877 (for what we know) and was put out to the public in 1778. This invention was very original and before its time. No one had ever heard or thought about this invention ever before and to have recite most of what it was saying back to you change the way we looked at technology.This