Of all the great unknowns in outer space, the dark universe might just be the most mysterious. Learn the basics of dark energy and dark matter and how scientists study this nearly undetectable realm of the cosmos. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Dark Universe 101 | National Geographic https://youtu.be/9HNtHTZ2FpQ...
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