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Published on 01 Jan 2014 | over 2 years ago

Welcome to the Official Documentary HD sm!

The BEST channel for all your Space & Universe, Science, Technology and Nature documentaries, all in HD! Weekly updated! So keep an eye on this channel and don't forget to subscribe! All video will be 720p at least, HD guaranteed!

Subscribe for more documentaries : www.youtube.com/user/DocumentaryHDsm

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