Stupid Interruption:Canada is part of North America geographically, I'm not exactly sure why they tie it to a geographic region but that's what was written in the article I read.
"only available in northern America"
Did you know that there isn't a consensus on the number of continents? We didn't until we reached Colombia. A friend of ours from Peru, also an overlander, asked us how we felt that we made it that far. We said it was neat to finally step foot on another continent. She was appalled and told us America, both North and South, is one continent. We told her we were taught that they were separate continents. We asked several other overlanders that were present (all from other countries) and some responded that America is actually three continents...North, Central and South. Of course we used the internet and learned that there is no consensus on the number of continents. Now you do too (if you didn't already), no wonder we can't solve basic problems.