AI chief to take over Google search engine

SAN FRANCISCO -- Google is putting its search engine in the hands of its artificial intelligence chief. John Giannandrea will take over from Amit Singhal who is leaving Google this month after 15 years. The move shows the ascendance and growing importance of artificial intelligence at the major Silicon Valley technology companies. Search is the engine that drives Google's lucrative advertising business. Artificial intelligence is increasingly behind advances in how Google answers search queries.