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1.  

   Science Channel

   Part of the Discovery Channel network of sites with videos like "How It's...

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2.  

   Science Tube

   Offers thousands of informative science related videos and lectures.

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3.  

   ScienceDaily

   Great place to watch the latest science and health news on video.

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4.  

   ScienceHack

   Informative video search engine where all videos are screened for accuracy...

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5.  

   ScienceStage

   Online portal for science is a site with videos to increase your...

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6.  

   Scientific American

   Check out the latest science themed videos from the venerable magazine...

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7.  

   SciVee

   Outlet where people share their scientific knowledge, research, and other...

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8.  

   SearchForVideo

   Find videos using multiple online providers.

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9.  

   Silicon

   CNET affiliated site with videos that cover the business and tech world.

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10.  

    Space-Video

    View a gallery of space videos from NASA and other sources.

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11.  

    Space.com

    Explore the final frontier with scientific videos and discussions about...

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12.  

    Spaceflight - Nasa

    Great archival footage of the U.S. and Russian space programs.

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13.  

    Stuff.tv

    Get yourself up to speed on the latest in gears and gadgetry with this...

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