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View hundreds of free videos from National Geographic, featuring animal videos, weather videos, nature videos, world music videos and other most popular video content including shark videos.

National Geographic Science and Space Home Page.

Activate study mode with book reviews, free essays, course notes, flashcards and other study tools. Millions of students use us to help with their homework assignments.

YouTube is a place to discover, watch, upload and share videos.

Ecology Global Network is a multimedia portal focused on ecology and the environment, providing content-rich resources with global perspectives.

Explore HISTORY shows, watch videos and full episodes, play games and access articles on historical topics at History.com.

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia e...

WikiAnswers: Questions and Answers from the Community

Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

Read biographies, play games, watch interviews and video clips at Biography.com. Check out our Born On This Day, Deathiversary, and Black History sections. Visit The Biography Channel for great TV shows like BIOGRAPHY, Notorious, I Survived..., and ...