Onzain / AFP When they were born premature in 1912, doctors gave Paulette and Simone the slimmest chance of survival. But 104 years later, the French twins say there’s a simple secret to their longevity: sticking together. With their long white hair tied back in ponytails and gold spectacles perched on their noses, Paulette Olivier and Simone Thiot are happy …

London / Bloomberg UK Chancellor of the Exchequer George Osborne must do more to back up the economic case for expanding Heathrow Airport, the chairman of Parliament’s Treasury Committee said. Lawmaker Andrew Tyrie wrote to Osborne for a second time after what he described as the chancellor’s “curious” explanation for stonewalling questions included in a January 25 letter. Osborne’s reply, …

You cannot understand the vulnerable state of the US and global economies — and nervous stock markets — without coming to grips with the crash of “emerging-market” countries. Led by China, these are middle-income countries that, along with the poorest countries, account for 85 percent of the world’s population and 60 percent of the global economy, according to Christine Lagarde, …