Google said its longtime search chief Amit Singhal is retiring and will be replaced by John Giannandrea, an executive who has worked on machine intelligence efforts.
Singhal joined Google in 2000 and has led the technical development of the Internet search engine since then. Improvements overseen by Singhal have helped make the eponymous web-search tool faster, smarter and able to peer into the innards of software running on mobile devices. At the same time, it was augmented with clever widgets like calculators and weather forecasts that materialize in response to certain queries.