Africa is the world's second-largest and second-most-populous continent (the first being Asia). At about 30.3 million km (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 /1e9 round 1 billion people as of , 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. It contains 54 fully recognised sovereign states (countries), nine territories and two "de facto" independent states with limited or no recognition. 

Africa's average population is the youngest amongst all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4. Algeria is Africa's largest country by area, and Nigeria is its largest by population. Africa, particularly central Eastern Africa, is widely accepted as the place of origin of humans and the Hominidae clade (great apes), as evidenced by the discovery of the earliest hominids and their ancestors, as well as later ones that have been dated to around seven million years ago, including "Sahelanthropus tchadensis", "Australopithecus africanus", "A. afarensis", "Homo erectus", "H. habilis" and "H. ergaster"—with the earliest "Homo sapiens" (modern human) found in Ethiopia being dated to circa 200,000 years ago. Africa straddles the equator and encompasses numerous climate areas; it is the only continent to stretch from the northern temperate to southern temperate zones.
What is the largest continet?
What is the most populous?
What is the second largest?
How big is it
What is the second most populous continent
How many people live in it
How much of the world's population is that
What Sea is to the north
What ocean is to the southeast
What about to the west
How many countries are in Africa
How many territories?
What is it's median age?
In what year?
What was the worldwide median age at that time
What is Africa's largest country by size
By population?
What is the scientific name for great apes?
Where was the earliest Homo sapiens found?
To what year was it dated
Asia
the first being Asia)
Asia
the first being Asia
Africa
Africa is the world's second-largest 
30.3 million km
30.3 million km
Africa
Africa is the world's second-largest and second-most-populous
1 billion people
1 billion people
16%
 16% of the world's human population
Mediterranean Sea
Mediterranean Sea to the north
Indian Ocean
Indian Ocean to the southeast 
Atlantic Ocean
Atlantic Ocean to the west.
54 fully recognised countries
 54 fully recognised sovereign states (countries
nine
nine territories
19.7
19.7
2012
2012 
30.4
 30.4
Algeria
Algeria is Africa's largest country by area
Nigeria
 Nigeria is its largest by population
Hominidae clade
Hominidae clade (great apes)
central Eastern Africa
central Eastern Africa, is widely accepted as the place of origin of humans and the Hominidae clade (great apes),
around seven million years ago
around seven million years ago