I love the BBC Radio 4 show "In Our Time" with Melvyn Bragg. There's a thousand or so episodes about philosophical, historical, and scientific topics, Melvin brings in professors and authors that are experts in the field being discussed and politely encourages them to fit whatever they have to say into less than an hour.
It's a great way to learn about something you may have never even realized you are interested in, such as The Great Irish Famine
The description of the episode reads in part,
"Melvyn Bragg and guests discuss why the potato crop failures in the 1840s had such a catastrophic impact in Ireland. It is estimated that one million people died from disease or starvation after the blight and another two million left the country within the decade. There had been famines before, but not on this scale. What was it about the laws, attitudes and responses that made this one so devastating?"
With
Cormac O'Grada - Professor Emeritus in the School of Economics at University College Dublin
Niamh Gallagher - University Lecturer in Modern British and Irish History at the University of Cambridge
Enda Delaney - Professor of Modern History and School Director of Research at the University of Edinburgh
I don't think you have to go to school to learn. At 70 I can say the vast majority of my learning has been outside of school. The more you learn about the world the more interesting it becomes.
The unexamined life is not worth living for some of us...so we like to do a lot of examining.
On the other hand, we can assert that "the examined life is not worth living" for some. Some criminals, CEO's and politicians fall into this category.
Whatever life you choose make the most of it.