Europe is the world's second-smallest continent by surface area, covering about 10,180,000 square kilometres (3,930,000sqmi) or 2% of the Earth's surface and about 6.8% of its land area. Of Europe's approximately 50 countries, Russia is by far the largest by both area and population, taking up 40% of the continent (although the country has territory in both Europe and Asia), while Vatican City is the smallest. Europe is the third-most populous continent after Asia and Africa, with a population of 739–743million or about 11% of the world's population. Europe has a climate heavily affected by warm Atlantic currents, tempering winters and enabling warm summers on most of the continent, even on latitudes that have severe climates in North America and Asia. Further from the Atlantic, seasonal differences increase, but the mildness of the climate remains.
Bowling refers to a series of sports or leisure activities in which a player rolls or throws a bowling ball towards a target. It is one of the major forms of throwing sports. In pin bowling variations, the target is usually to knock over pins at the end of a lane. When all the pins are knocked down on the first roll, this is a strike. In target variations, the aim is usually to get the ball as close to a mark as possible. The pin version of bowling is often played on a flat wooden or other synthetic surface (which can be oiled in different patterns for different techniques), while in target bowling, the surface may be grass, gravel or a synthetic surface. The most common types of pin bowling include ten-pin, nine-pin, candlepin, duckpin and five-pin bowling, while in target bowling, bowls, skittles, kegel, bocce, carpet bowls, pétanque, and boules, both indoor and outdoor varieties are popular. Today the sport of bowling is enjoyed by 100 million people in more than 90 countries worldwide (including 70 million in the U.S.), and continues to grow through entertainment media such as video games for home consoles and handheld devices.