Podcasts are great: I can freely skip parts and jump around and learn great deal of topics I do not know and I can learn how to pronounce polysyllable terms of academic jargon.
My favorites are
BBC has a great selection of podcast
In Our Time: They discuss many topics: science, religion, history and culture. Guests are mostly well established professionals. It is great way to learn how to discus topics and ask and answer questions. The best part is there is no dummy in the shows unless the topic itself is dumb. You can sense how you would feel if you were at a dinner table among specialists. The host is great.
Forum: it discuss many provocative topics. It is often great but a layman guess often spoiled a show, who ask surprisingly dull questions: no question is a stupid question, often said, but some guests manage to pull off truly pathetic questions.
This week in virology: Vincent and many great hosts and a guest discuss virology. Viruses are a stripped down minimalistic entity, enabling to discus many important topics in biology.
This week in parasitology: Dickson and Vincent are great hosts. Their free flow conversational style engages audiences.
This week in microbiology: Unfortunately sometime hosts engage in long monologues. They talk about intriguing topics but the style is not so enjoyable to my ears.
Future in Biotech: It is great but sometime guests were got hammered. It sounds like a PhD committee meeting. Great guests including Novel prize winners. I did not like the style but I started like it.It aims to PhD or professionals.
Dr Kiki’s science hour: Too much psychology related things. The quality of a show varies depending on the topics or a guest: some show are nothing but chatting.
TED: It is great but it can become an artificial monologue where a speaker never face hostile questions. It might be good for learning English but we cannot learn more sophisticated discussion skills. Unfortunately Chris Anderson is hosting TED: he is the creater but his comments often spoil an excellent talk. I always stop the video as soon as I see his shadow.
SciFri: Great but some time dumb topic.
Science Times: I used to think NYT science sections were written by good scientists. But unfortunately many articles are not written by scientists. So there are low quality silly articles.
Long now Foundation: The host talks really slow.
Big Picture Science: Great hosts: but they are trying to be funny too often when normal style should be suffice.
These are good links from c2c.
Synthetic Biology: Drew Endy debates Jim thomas at the longnow foundation seminars on longterm thinking