
A photo-sharing service, for example, could create a MySpace-friendly program that allows users to let their friends flip through photos on their own page, instead of leaving the site. Facebook and other Web 2.0 leaders have already gone this route, and the experiment has proven successful. The point of all this, of course, is to keep users in the community. If they don’t ever leave, then they don’t go looking at some other site’s ads.
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Inside NASA's astronaut bootcamp and the grueling new training regimen for deep space. Plus, ten young geniuses shaking up science today, one writer's quest to analyze every man-made chemical in her body and more.
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