Why is Microsoft so desperate to acquire Yahoo's search business? According to ComScore, Google's video-sharing site YouTube and Google's other subsidiaries alone attracted more search queries than all of Microsoft's properties combined in April. Comparing total searches for each company is similarly lopsided; Google controls 61 percent of the search market to Microsoft's 9.1 percent, which is a decline from 9.4 percent in March. Problem is, buying Yahoo might not help. Yahoo lost search market share last month, too, dropping from 21.3 percent to 20.4 in just one month.

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