Peter Stratton : "Computers and brains work in virtually opposite ways. Computers are laboriously programmed for specific tasks. Brains learn from experience and can perform a wide variety of complicated tasks that are currently impossible for a computer. But in the journal Science , scientists from IBM and Cornell University published details of a computer chip called TrueNorth that mimics much of what we know about how the brain works – and the possibilities for such technology are mind-boggling…