Discover Networks acquired Revision3 several months ago. Now, the two companies launched the network TestTube, about all things science.
dnews
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Science Channel Announces Daily TV Program Hosted By DNews (Exclusive)
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Revision3, Discovery Get Curious, Launch New TestTube Video Network
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Discovery Leveraging Revision3 For Science News Channel On YouTube
Revision3 hosts Anthony Carboni and Laci Green are hosts of DNews, a YouTube version of Discovery News (whose Trace Dominguez is also a host)
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