Earlier this year BBC Radio 4’s flagship In Our Time programme had an almost Lovecraftian wobble, when in quick succession they did excellent programmes introducing the science and current knowledge of Cephalopods and Fungi. Both are very clear round-table discussions, done in the usual In Our Time manner. Audio downloads in .MP3s are available, and apparently there are no UK-only region-locks on them. Be aware that the Cephalopods programme has spoilers for the science-fiction movie Arrival.