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https://www.mentalfloss.com/science/space/astronomers-discover-galactic-wall-stretches-1-billion-light-years
Astronomers Discover a Galactic Wall That Stretches 1 Billion Light-Years
This could be the largest structure in the known universe
galactic wallastronomersdiscoverstretchesbillion
https://www.printables.com/model/173494-wall-thickness-test
Wall Thickness Test by galactic | Download free STL model | Printables.com
download freewallthicknesstestgalactic