If forced to name the greatest human named Stephen, Stephen Fry has to be somewhere near the top of the list. Eloquent and witty with an unparalleled love of of both language and learning.
He has a new podcast called Great Leap Years - The Stories Behind Inventions. Specifically he's focused around inventions related to communication and information technology. It starts at the beginning with the development of language. If you're unfamiliar with the intense verbal tango that is listening to Stephen Fry, here's a sample of what you're in for:
The podcast is available through his website, but also through Apple Podcasts and quite free to enjoy. As far as I'm concerned, the episodes can't come out fast enough.