Question about dark matter?

Nobody really knows what dark matter is... The search is on for "WIMPs" (weakly interactive mive particles), which *should* exist everywhere. That's the thing about our universe - if it's in one place, *generally*, it should be everywhere. The iron atoms in your blood will act & look just like iron atoms in the heart of a star a billion light years from here. Dark Matter is really only a theory, because astronomers have noticed that they don't *see* enough matter in galaxies for them to spin as fast as they do. Dark matter (and it's cousin, dark energy), is just an attempt at an explanation right now; until they can actually detect it - no one really knows what it is.