Lasers and carbon-nanotubes pave way to live brain scanning

Lasers and carbon nanotubes peering into the brain might sound like the stuff of science fiction, but tests that could one day mean precise non-invasive diagnosis of Alzheimer's, Parkinson's, and other diseases are already underway. The technology, developed by chemists at Stanford University, has so far been tested on mice, but opens the door to an alternative to physically removing …