I listen to many podcasts as my primary form of audio entertainment, and because Hacker Public Radio listeners also tend to be podcast listeners (pretty much by definition) I am sharing my finds with the community. Besides, Ken made me do it.
Links:
https://soundcloud.com/guitar-player-magazine
http://www.planetary.org/multimedia/planetary-radio/
http://revisionisthistory.com/
http://www.revolutionspodcast.com/
https://www.sciencefriday.com/podcast/
https://www.scientificamerican.com/podcast/science-talk/
https://www.scientificamerican.com/podcast/60-second-science/
https://twit.tv/shows/security-now
http://www.sherlockholmespodcast.com/
http://somethingaboutthebeatles.com/
https://nakedsecurity.sophos.com/category/audio-and-video/podcast/
https://www.startalkradio.net/
http://swingingthroughthesixties.com/
https://beatlesexaminer.podbean.com/
https://twit.tv/shows/this-week-in-google
https://twit.tv/shows/this-week-in-tech
https://twit.tv/shows/triangulation
http://www.undiscoveredpodcast.org/
http://www.welcometonightvale.com/
https://smlr.us/
http://www.palain.com