Astronomers make an extraordinary discovery when they uncover a cosmic mega-structure, the BOSS Great Wall, that's one billion light-years long, and now investigators race to decode the hidden forces that shape the most massive and mysterious structure known in the Universe. 

Astronauts have detected a mysterious region of space, the South Atlantic Anomaly (SAA), that's dangerous for reasons they have yet to understand, and scientists believe the long-term effects of this danger zone may have implications for the future of humanity both in space and on Earth.