Vince B. sent in a great question, why isn't Greenland considered a continent? Well I am no geographer, but I work with a guy who is, Dr. William Osei of the Algoma University Geography Department.
It turns out that the word continent is a pretty arbitrarily defined thing. Basically, according to Dr. Osei, it is based pretty much on size and convention. Greenland is actually quite small by continent standards, it is only 1/14th the size of Africa!
Thanks to Isabelle for the new music.