Microsoft announced that it made an offer to buy Yahoo! for 44.6 billion dollars, FoxNews.com informs. The company founded by Bill Gates offers 31 US Dollars per each Yahoo! share. The transaction would be one of the largest in the industry and it is seen as an attempt from both giants to deal with newcomers like Google. The stakes are high, the Internet advertising market being expected to grow from 40 billion dollars in 2007 to 80 billions before 2010.