Visualizing the Size of the Universe With a Grain of Sand

The universe is so incredibly large that it's difficult to know where to begin when trying to visualize its size. This video should help you get your head around that very problem. More »

Source: http://feeds.gawker.com/~r/gizmodo/full/~3/sFLTelpht-k/visualizing-the-size-of-the-universe-with-a-grain-of-sand

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