Don't know if this will work outside of the UK, but, one of my can't miss radio shows is often
Melvyn Bragg's In Our Time.
I say 'often' because one week the show is about something like the Speed of Light and the next, it's about Renaissance Poetry - guess which find more personally interesting!
Anyway, until this Thursday, the latest programme about Archimedes is available as an
MP3 download.
The science-based programmes are available as a Listen Again thingmy
here.