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StumbleUpon is a discovery and advertisement engine (a form of web search engine) that pushes recommends of web content to its users. Its features allow users to discover and rate Web pages, photos and videos that are personalized to their tastes and interests using peer-sourcing, social-networking and advertising (sponsored pages) principles.
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Sussle is the first, open visual encyclopedia. Anyone can use it.
It has beautiful images and viral videos that are way more fun than reading all the text in traditional encyclopedias.
Just click on the red module above.