German politician and banker Thilo Sarrazin scared his countrymen with unsophisticated analysis and a eugenics-based argument about native intelligence.
A leading canine researcher says dogs understand more than 150 words and can count up to four or five. He has compiled a list of the world's smartest dogs. See if your pooch cracks his Top 7.
Public debate has been dominated by the belief that education builds human capital, causing increased income, health and political participation, among many positive outcomes. But new research suggests that costly expansions of education may not always bring the promised social results. In some cases, those expansions may do little but sort people according to their native ability.