Rules for what it contains
see size, its self explanitory
Cause for blue-ness
The cause for blue-ness is because when matter is zoomed out (like, alot) it causes the matter to turn blue. (reason is unknown)
These holes are actually wormholes to a diffrerent hole, so you can travel around it quickly
people discover its existance
people map the entire multiverse by using special rays that can travel longer than a light
People map an entire genericaverse!
People manage to Map An entire hole!
They mapped The entire Quadboboverse!!!!