If you are interested in listening to a great podcast, I would recommend checking out The Joe Rogan Experience. You'll definitely improve your vocabulary and your understanding of different topics in English by listening to his podcasts. Mr. Rogan has over 900 podcasts with different guests and it's all done in the English language.
I have attached to this discussion, JRE #985 with Gad Saad, a behavioral psychologist and scientist who is very bright and well-spoken. I hope you all enjoy this podcast and that it improves your English listening skills!