It's the Christmas Episode! - Holly and Chestnuts (or just skip to the end and find out how to win some $$$)

You've sung about them, you've heard people sing about them, now
learn about them!  It's a show about American Holly (Ilex
opaca) and American Chestnut (Castanea dentata).  And stay
tuned as we discuss how your idea could earn you $20,000 and help
our bat friends too!