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        In the 1880's, Hertz proved the possibility of radio but through electricity waves. - 
  
  
        Nikola Tesla invents his "Tesla Coil", which could produce bolts of high voltage electricity at a low current. - 
  
  
        The first radio station was KDKA. - 
  
  
        The first commercial on the radio was one for an apartment complex that was 10 minutes and cost $50 to air. - 
  
  
        The 30's and 40's was known as the "Golden Era" of radio. - 
  
  
        The mass popularity of TV almost immediately killed off the existence of the "Radio Star".