In a surprise move, the Bank of Japan introduces a negative interest rate to counter the ongoing economic slump in the world's third-largest economy.
An artificial intelligence program developed by Google beats Europe's top Go player about a decade earlier than had been expected.
Stephen Wolfram introduces his step-by-step book on the Wolfram Language. Principles of the language develop through clear examples.
BBC Urdu's Iram Abbasi travels to the Pakistani village where a boy cut off his own hand after being accused of blasphemy - and is now being hailed as a religious hero.
In Douglasville, Ga., and other cities, seminars instructing residents to stay alert, and to attack the attacker if necessary, have become increasingly common.
An orgy of Shakespeare celebration is about to occur. The bard can tell us a lot about what it means to be wise, writes Howard Jacobson.