Hot/Warm/Cold Dark Matter., page 1

Dark matter composition
Unsolved problems in physics: What is dark matter? How is it generated? Is it related to supersymmetry?

Although dark matter was detected by its gravitational lensing in August 2006,[12][13][14] many aspects of dark matter remain speculative. The DAMA/NaI experiment and its successor DAMA/LIBRA have claimed to directly detect dark matter passing through the Earth, though most scientists remain skeptical since negative results of other experiments are (almost) incompatible with the DAMA results if dark matter consists of neutralinos.

Data from a number of lines of evidence, including galaxy rotation curves, gravitational lensing, structure formation, and the fraction of baryons in clusters and the cluster abundance combined with independent evidence for the baryon density, indicate that 85-90% of the mass in the universe does not interact with the electromagnetic force. This "dark matter" is evident through its gravitational effect. Several categories of dark matter have been postulated.

* Nonbaryonic dark matter[15] - which is divided into three different types:
o Hot dark matter - nonbaryonic particles that move ultrarelativistically[16]
o Warm dark matter - nonbaryonic particles that move relativistically
o Cold dark matter - nonbaryonic particles that move non-relativistically[17]

from:
en.wikipedia.org...

***Seems the observation has become more and more interesting. Ultra-norm-non relative. And, obvious implied momentum. What, in this world is it?
So, it's like, here we have something we've looked into, seen evidence. Suggested it would not behave under normal five forces. Now, all of a sudden, I'm going ultra-wait-don't at what the heck I saw to begin with. Confusing?

I'd assume that a lot of this momentum (detectable, of course); is, in fact, dispersed throughout the expanse of space. Where, these assumed collisions are interacted upon yet further. But, ultra and non relative. Where's Einstein when you need him...