Could Galactic Walls Prove We’re Wrong About The Universe? Astronomers have just found the biggest galaxy wall yet. What is a cosmic great wall, and how do we find them? Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts Can The Earth Run Out Of Oxygen? How Does Fusion Power the Sun? The Backwards Brain Bicycle Farming Metal From Plants Could Be the Future of Sustainable Tech What If Black Holes Don’t Exist At All? 5 of the World’s Most Dangerous Chemicals