The Royal Society has a podcast! Both in Audio and Video versions.
Each podcast is well produced and features a famous scientist or popularizer giving a short but entertaining lecture, or a scholar discussing the history behind some famous member of the Society. I love them!
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it comes first to fluidity, then to orbiculation, then fixation, so to angulization, then crystallization, from thence to germination or ebullition, then vegetation, then plantanimation, perfect animation, sensation local motion, and the like
-Gimcrack, making fun of Robert Hooke
Minus Two Fish 