Scientists are looking to South-East Asia to find how the virus got its start in humans. Knowing that could head off future pandemics. It is often hard to blame climate change unequivocally for weather events, but there is no other explanation for this year’s searing Arctic temperatures. And why well-to-do Africans are shopping around for more permissive passports. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer