In Our Time
What do Zeno's Paradoxes, Tutankhamun, The Illiad, Papal infalibility and genetic mutation have in common?
They've all been the subject of an episode of In Our Time.
In Our Time is a BBC Radio 4 program, where Melvyn Bragg invites two or three experts in to the studio, where they then spend 45 minutes calmly talking about a subject.
The various categories are:
I have to confess that sometimes I do nod off, but listening to intelligent people talking calmly about intelligent things (often that I've never even heard of before) is a really good way to stimulate the curious mind.