The revolution in artificial intelligence is sucking up a lot of electrical power, something that's growing at an alarming rate.  Science may have a solution in a new generation of highly efficient computer chips that use materials other than silicon and depend on light, rather than electricity to process data, bringing down power demands.  Dr. Milan Delor, a chemist from Columbia University, spoke about the groundbreaking work his lab is doing in a "Town Talk" sponsored by Telluride Science. His presentation was moderated by veteran broadcast journalists Judy Muller and George Lewis.