A good way to get entertained and keep up with news in the sciences is to read New Scientist magazine. Although it is British, there really isn't an American equivalent and the magazine has become much more international over the last few years. It really isn't that expensive to subscribe especially since it is a weekly magazine but you can also read many of the articles on their website (or in the library copy of course). Although they do have a few longer articles each week, much of the magazine consists of brief news reports on recent research.
Here's a brief news report from last year that ties in to the first two classes.
Gut parasites came from the deep: A genetic comparison finds links between bacteria from deep-sea vents and those from the human body. 7 July 2007.