As China rings in the New Year, a brief look at some of the problems the country is facing.
How large is the Nigerian population really? Nobody knows for sure.
Back in 1900, immigrants made up 3% of the global population. What is the percentage today?
A cultural bias towards male heirs is creating a vast gender divide in China.
Adverse demographic trends are at the heart of the problems for Israel.
More contraception would help Africa educate the young and govern itself.
What is the average population size of an EU country? 5, 10, 20 or 40 million?
California is a land of its own, constrained by 49 other states. How many of the smallest U.S. states would it take to reach the population of California?
Why is Russia, despite its serious economic challenges, still worthy of being a BRIC?