It took the radio 38 years to reach a 50 million person audience

When radio first hit the airwaves, it seemed like it would be quite a big deal. For the first time in forever, you could listen to people talk about things and the biggest songs in the world from the comfort of your living room. It was a big deal, but it still took radio broadcasters 38 years to reach an audience of 50 million. To put that in perspective, it took television only 13 years to reach the 50 million mark, and the internet took only 4 years.