What shapes intelligence? Is IQ hereditary? Does schooling determine it? Or is it more than that? David Kirp tackles that nebulous quotient and discovers that IQ is influenced by some surprising factors. Meanwhile, Terence Samuel considers the Arlen Specter switch-up within the context of the Republican Party's decline. As always, subscribe to our RSS feed to receive our articles as soon as they are published. Also, follow us on Twitter for highlights from our blog. --The Editors
