The one thing that connects all things is SPACE.
Perhaps the greatest error in the standard model of physics is the fact that they ignore the fact that the vacuum of space is not empty - it's actually completely full with energy!
When we look at the vacuum at the smallest scales possible we see that it is highly energized with what are called "quantum vacuum fluctuations", also known as the aether, the plenum, the zero point field, the quantum foam, space and the vacuum. Regardless of what you call it, the fact is we have measured the emptiness of space as not empty at all, yet in the standard model they simply sweep this number under the rug using a mathematical trick called "renormalization" (rounding off an incredibly large number) and then proceed about their business writing their field equations as if it was not significant despite the fact that the measured value of the energy present in a cubic centimeter of space is 39 orders of magnitude denser than all of the regular matter of the entire universe squashed into a cubic centimeter!
No wonder they are unable to find this mysterious "dark matter".
They can't find it like a fish can't find water because we are bathing in and made of an infinitely dense super-fluid like medium we call space that happens to appear to us as "nothing" because its in a perfect state of balanced equilibrium due to the perfect scalar geometry of the structure space itself.