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Marissa Mayer's move from Google exec to Yahoo! CEO made her one of the most powerful women in the tech industry. Her announcement just three hours later that she's expecting her first child made her "the most powerful pregnant woman in America," says Lisa Belkin of The Huffington Post.

Yahoo is hiring longtime Google executive Marissa Mayer to be its next CEO, the fifth in five years as the company struggles to rebound from financial malaise and internal turmoil. Mayer, who starts at Yahoo Inc. on Tuesday, was one of Google's earliest employees and was most recently responsible for its mapping, local and location services. Mayer, 37, began her career at Google in 1999 after getting her master's degree at Stanford, the school Google's co-founders attended.

Google has launched Google Now, a new search interface which improves the search results based on the time and location of the search. It is available as part of Android Jelly Bean, the latest iteration of its mobile OS, and works by using the time, search history and location data to provide better search results.

Pitting Google search against Siri using a monster 1600-question test shows how useful Siri really is: not at all. Google answered correctly 86 percent of the time. Siri achieved just 68 percent accuracy. At that point, it's not much better than a crystal ball.

U.S. authorities are leading the charge as governments around the world pepper Google with more demands to remove online content and turn over information about people using its Internet search engine, YouTube video site and other services.

Yelp is feeding its online reviews of restaurants and other local merchants to Microsoft's Bing search engine in a move to compete against Zagat ratings on Google.

Google has reached a deal with a publishing group to allow the scanning and publishing of books online - ending a six-year legal battle. A court ruled in 2009 that the search company was in breach of copyright infringement after it digitised a number of French books.

Google said on Saturday that Chinese authorities have approved its $12.5 billion purchase of Motorola Mobility Holdings, the last regulatory hurdle to a deal that would allow the world's No. 1 Internet search engine to develop its own line of smart phones.

Google said it is rolling out an extensive update to its dominant search engine by using troves of data to refine the answers it provides to user queries on specific topics. The technology known as "Knowledge Graph" is being rolled out by Google within its search service over the coming weeks, the company said Wednesday. It uses a database of about 500 million people, places and things compiled by the company to figure out what users are looking for, and present them with additional, related information.

Google Inc and its board were sued on Monday by a shareholder who wants to block the company's stock split plan because it entrenches the Web search company's co-founders Larry Page and Sergey Brin, according to court documents.