Every 2nd Tuesday, I go to the Scott Polar Research Institute in Cambridge for a U3AC talk on the Arctic and Antarctic. Today, the talk was about Spitsbergen high up in the Arctic. Very interesting too.
We are very lucky in Cambridge having such good speakers/lecturers and a wide choice of subjects. Last term I studied the Anglo-Saxons! This was very far removed from electronics. It was enjoyable nonetheless.
It is so good to learn with no exams, no notes (unless you want to) - in fact learning about things that interest you for pure pleasure.