Europe is geologically and geographically a peninsula or subcontinent, forming the westernmost part of Eurasia. Europe is conventionally considered a continent; this is more of a cultural distinction than a geographic one. Europe is bounded to the north by the Arctic Ocean, to the west by the Atlantic Ocean, to the south by the Mediterranean Sea, and to the east its boundary is culturally determined and unclear.
However, the Ural Mountains are considered by some to be a geographical and tectonic landmark separating Europe and Asia.
When considered a continent, Europe is the world's second-smallest continent in terms of area, with an area of 10,600,000 km² (4,140,625 square miles). In terms of population, it is the third-largest continent. The population of Europe is roughly 700,000,000: about 11% of the world's population.