Space's Deepest Secrets (2016)

S08E02 Space's Great Wall

A groundbreaking revelation unfolds as astronomers identify an enormous cosmic mega-structure stretching one billion light-years. This astonishing find sparks a flurry of investigation as scientists endeavor to unravel the enigmatic forces that contribute to the formation of this colossal and perplexing structure, recognized as the largest of its kind in the Universe.