smokeandapancak said:Wee bit off topic....for sure...
But I just gotta ask it..
Europe doesnt fit the definition of continent does it ? .... How do you tell where Asia begins and Europe ends.....
Wasnt there a push years ago to call it Eurasia n the geography circles ???
Good question. Is it something like the continental divide in America? A point where rivers flow either East or West dividing the continents. This proposed change was probably driven by the fact that Europe and Asia (except for India) are on the same tectonic plate http://en.wikipedia.org/wiki/Image

Also from Wikipedia...
"boundary between Asia and Europe is conventionally considered to run through the Dardanelles, the Sea of Marmara, the Bosporus, the Black Sea, the Caucasus Mountains, the Caspian Sea, the Ural River to its source, and the Ural Mountains to the Kara Sea near Kara, Russia"