'Grandpa Google' is in danger of becoming irrelevant to younger generations, company exec testifies at antitrust trial

• Google leaders fear the search engine could become irrelevant to youth, a company exec testified.
• Senior VP Prabhakar Raghavan said Google is beset by rivals and youth call it "Grandpa Google."
• The company is defending itself in a landmark antitrust case brought by the US government.

WASHINGTON – A top Google executive testified Thursday that the company's success is precarious and said its leadership fears their product could slide into irrelevance with younger internet users.