The G20 Summit gets under way in Bali today at a time of tensions over Ukraine and Taiwan, and worries about high food and energy prices. We look at what progress, if any, is likely to result from the high-level meeting. An unusually warm autumn has kept gas prices low in Europe. And what a Nobel-prize winner’s work suggests about Neanderthal family life. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer