Anne McElvoy talks to the Pulitzer Prize winner, Katherine Boo about her book, Behind the Beautiful Forevers. Jackie Wullschlager reviews the literally luminous new show at Tate Liverpool which features the late work of Twombly, Turner and Monet; one of our New Generation thinkers, Timothy Secret, reflects on how we mourn our dead and Uta Frith, Harry Collins and Marcus Chown explore a new twist on the legacy of one of the great scientific minds of the 20th Century, Alan Turing.