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LOUISVILLE - TestToob, an online community where young people can collaborate on science, was 'born in the backyard and incubated on the kitchen table,' its founder says.

The last few years have seen an increasing number of events where a person's online actions impacted their offline lives, almost always in a negative way.

The Wall Street Journal is borrowing elements from popular internet hangouts like Facebook as it seeks to boost usage.

Yahoo Inc. executives provided an update on the company's plans to open its online services -- including its home page and email service -- to contributions from third-party internet and software companies. The efforts, described in a briefing at the company's headquarters in Sunnyvale, Calif., range from allowing users to search other content -- such as classified-ad sites -- from within Yahoo Mail to allowing them to access online music download services like that of Amazon.com Inc. from within Yahoo Music. Yahoo also said it will be redesigning its home page to make it easier for users to tap these third-party services, demonstrating how users might add a link to the movie site Netflix Inc. in the right corner of their screens.