Not only does dark matter make up a missing huge amount of mass that generates enough gravity to hold the Universe together,
but dark energy is an even larger chunk, and may explain why the whole shebang is expanding at an accelerating rate.
The Rubens telescope in Chile will be able to photograph the entire sky in 3 nights, instead of the previous decades for the same task.
It will continuously repeat the process for ten years, allowing astronomers to animate the observed expansion and allow better measurements.
In short, they now think that the big U is made up of 25% dark matter, 70% dark energy, and the remaining 5% is what we are able to see.
They are building a deep underground facility to filter out all cosmic radiation. Sodium whatever which will produce light when it collides with dark matter, so they will be able to detect it.
They say that we are totally unaware of the passage of dark matter through our bodies (and everything else on Earth), but I wonder if those sudden twinges I get in my joints are bits that don't pass through cleanly
