Frankly, something called Talking Biotech would not normally get a second look from me. Too narrow. Too nerdy. Probably too preachy. But I’d be wrong in the case of Dr Kevin Folta’s podcast. It is nerdy, but in a good way; and it isn’t preachy (well, mostly not too preachy). And, despite it’s title, it’s not just about biotech. There tends to be a section in each hour-long weekly episode, usually towards the end, where an expert talks to Dr Folta about how a crop evolved, and how it is being improved: recent episodes include Dr David Spooner on the potato, Prof. Pat Heslop-Harrison on the banana, and Drs Shelby Ellison and Philipp Simon on the carrot. You can subscribe in iTunes, where you can also leave a review.