Your assignment requires you to find an intriguing article, either on the web or in print.
The topic you choose should "fit" in several important respects: your interests and knowledge, the purpose of the assignment, the type of paper (report, issue, argument), and the length of the paper.
As you've looked through encyclopedias, books and websites you should already have a list of keywords started about your topic. This list should include broad and narrow terminology.
We advise you keep a list near you throughout the research process and that you continually add words or concepts to this list. Research is a fluid and cyclical process. Bear in mind you may want to search the same sources several times whenever you add new terms.
Some podcasts can be very broad, like the CNN or NPR news brief, or very narrow like this one on Pop Culture. Do a Google search to see if there's a podcast out there on your topic.