And in a paper published by Nature to coincide with NASA's announcement of its candidates, that discovery was trumped six times over by an analysis of the most populous putative system, Kepler 11, 2, 000 light-years from Earth.
Transparency International's corruption-perceptions index suggests that corruption is rife: in 2010, on a scale from one (the worst) to ten, Western Europe's five most populous countries received an average score of 6.5, whereas the three most populous countries in the Middle East averaged 3.2 (Turkey scored 4.4, Egypt 3.1 and Iran 2.2).