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1. 

   Best documentary, please re telecast all ur space related documentaries on Nat Geo Hindi

2. 

   dis shit never works in my country     (this video content from national geographic who has blocked it in ur country on copyrights grounds)  fuck youtube 

   • 

     install hotspot shield 
     http://hotspotshield.com/ then refresh the video window..job done, enjoy 🙂

3. 

   what ever happened to the theoretical ort cloud? heh

4. 

   Can’t watch this video not available in my country!

5. 

   finally found a link Fuck Jew tube

   http://cool3net.com/video/79X29SSNSGM4/National-Geographic-Extreme-Universe-4of6-Edge-of-Space

6. 

   Fuck YOutube

7. 

   this is broken

8. 

   Missing Part 4

9. 

   Great video!