Nobel prize goes to brain scientists

STOCKHOLM (AP) — The Nobel Prize in medicine was awarded Monday to three scientists whose work led to a tool that uses light to help unravel how the brain works. Dr. Karl Deisseroth, Peter Hegemann and Georg Nagel carried out research that opened a new field with the wonky name optogenetics, combining light with genes to switch on and off neurons in living brains. Separate research from the trio — one of whom lives in the US and two in Germany — resulted in a technique that helps to identify neu