What's Hidden Behind The Giant Wall At The Edge Of Universe?

In twenty thirteen, astronomers studying gamma-ray bursts in outer space came across one huge thing. Looks like ten billion light-years away from Earth; a colossal gleaming wall stands in space. Can it be true? People believed in a solid vault of heaven with stars hammered in it. Behind this wall, there allegedly lived divine beings. But no matter how silly this idea seems now, walls in the sky really exist, and they are even more fascinating than that. In this video, you'll travel from the nearest boundaries where Earth ends and space begins to the walls that stand on the other side of the Universe. What are they made of? Can they be a portal to another Universe?

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