Africa  is the world's second-largest and second-most populous  continent , after  Asia  in both cases. At about 30.3 million km 2  (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20% of its land area.  With 1.4 billion people  as of 2021, it accounts for about  18% of the world's  human population . Africa's population is the youngest amongst all the continents. © Wikipedia.org