10 Unsolved Mysteries of the Universe (Video)

People know a lot about our world and the universe now. It's easy to look at the past and scoff at how much they didn't know but, before we get too proud of ourselves it's good to be reminded of some of the really important stuff we don't know. Today Alltime10s has a new video to help us do that. The video is short, but hopefully some of this will be covered in more depth when Neil deGrasse Tyson brings Cosmos to our TVs starting March 9 (see a new promo below)



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