I’ve discovered a superb scientific podcast, Astronomy Cast covering astronomy and space exploration. The show is presented by an outstandingly-fluent academic and a lively magazine editor. They take a single subject per podcast, and discuss it in-depth and with a clear structure. Some of the podcasts in the archive will interest Lovecraftians, such as:
Planet X (detecting unknown planets beyond Pluto).
Astronomy in Science Fiction (special edition at a convention, discussion of TV and movies only).