In a bumper episode, we highlight a summer’s-worth of deeply reported stories from 1843, our sister magazine: we profile Muhammad bin Salman, the de facto leader of Saudi Arabia, who is both a liberalising reformer and a fearsome consolidator of power. We ask why magicians are behind so many viral videos. And we explore humanity’s long-running ambivalence toward the sun. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer