Africa is considered by most paleoanthropologists to be the oldest inhabited territory on Earth, with the human species originating from the continent. Africa is the world’s second-largest and second-most-populous continent (the first being Asia). At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth’s total surface area and 20.4% of its total land area. With 1.2 billion people as of 2016, it accounts for about 16% of the world’s human population. The continent is surrounded by the Mediterranean Sea to the north, both the Suez Canal and the Red Sea along the Sinai Peninsula to the northeast, the Indian Ocean to the southeast and the Atlantic Ocean to the west. The continent includes Madagascar and various archipelagos.