Coming to you from the top of the Music City Tower in Nashville, Tennessee, it's The Chris Crofton Show, Episode 15. Hey Greg: Hit me with some science! I haven't had a chance to listen to this one all the way through yet; I was busy picking out the surface for my tennis court.
Update: After discovering that the first version of the MP3 cut off a bit prematurely, Lake Fever's Joe Baine Colvert re-uploaded the file. You can now hear the show in its entirety at the link below.