'No large group is known to have maintained complete reproductive isolation for extended periods…
no matter the languages we speak or the colour of our skin, we share ancestors who planted rice on the banks of the Yangtze,
who first domesticated horses on the steppes of the Ukraine, who hunted giant sloths in the forests of North and South America, and
who laboured to build the Great Pyramid of Khufu.'
—Douglas Rohde, Steve Olsen & Joseph Chang, Modelling the recent common ancestry of all living humans,
in Nature (2004)
Population of the world and continental regions,
children (aged less than 15 years): 1950-2010
Notes: The number of children in the world has been constant since 1999 at around 1.85 billion. In 2005,
1.10 billion children were in Asia, 380 million in Africa, 170 million in Latin America and the Caribbean, 120 million
in Europe, 70 million in North America, and 8 million in Oceania.
In most regions the number of children is either decreasing or not changing greatly,
but in Africa it continues to increase by about 7 million a year. Europe's number of children peaked in 1966 at
nearly 170 million.
Notes: The number of children in the world has been constant since 1999 at around 1.85 billion. In 2005, 1.10 billion children were in Asia, 380 million in Africa, 170 million in Latin America and the Caribbean, 120 million in Europe, 70 million in North America, and 8 million in Oceania.
In most regions the number of children is either decreasing or not changing greatly, but in Africa it continues to increase by about 7 million a year. Europe's number of children peaked in 1966 at nearly 170 million.
Source of data: United Nations Population Division, "World Population Prospects: The 2006 Revision".