How to fill time in retirement

I use to watch a show on PBS called Connections . It was hosted by James Burke and showed the interconnections between a past historical event to a modern invention or technology. I just am fascinated by the logic of a gives us b and b gives us c and c led to d . Simplicity in a complex world. I see it all the time within my own life, and now that I started to read a variety of books, I see it in how stories are developed or instigated. A similar concept to Connections is the Bacon number, based on the actor Kevin Bacon and his connection to other actors. For example: Kevin Bacon was in Lonely Hearts with Laura Dern who was in Novocaine with John Travolta , thus the Bacon number for Travolta is 2 There is a fun website called "The Oracle of Bacon" which allows you to put in any two actors and find the connection. For fun, I tried Buster Keaton and Danny DeVito. Silent film star to short guy on Taxi. Amazingly, they have a number of 2: Buster Keaton was in San Diego