Quantum mechanics, Carl Sagan once observed, is so strange that “common sense is almost useless in approaching it.” Scientists still don’t understand exactly why matter behaves as it does at the quantum level. Yet they’re getting better at exploiting its peculiar dynamics — in ways that may soon upend the technology business. One of the most interesting applications is …

  Brexit pressure is mounting on Theresa May and the British Prime Minister will have to cross the molehills before she hits the mountain ahead. While Japan has warned that its companies might walk out if they don’t get access to the single market in the UK, the US has shown its reluctance to enter into a trade deal with …

  India’s just-released GDP figures show it’s still the world’s fastest-growing large economy. Over the past decade or so, those numbers have swooped and stuttered —from the boom years of the mid-2000s, when easy money and roaring demand pushed growth up to nearly double digits, to the hard stop at the time of the 2008 financial crisis, to the dramatic, …