Africa is the world’s second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth’s land area and 6% of its total surface area. With nearly 1.4 billion people, it accounts for about 18% of the world’s human population. Africa’s population is the youngest among all the continents. Average age in 2012 was 19.7, when […]