Google is developing cancer and heart attack detectorIt marks the firm's latest shift into the medical sector following its work on glucose-measuring contact lenses for patients with diabetes and the acquisition of a start-up that developed a spoon to counteract the tremors caused by Parkinson's disease. Google has also bought stakes in Calico, an anti-ageing research company, and 23andMe, which offers personal genetic-testing kits. "Nanoparticles..
