Science Porn

[Anomalocaris]

um . . .

I think we do.

It's association with galaxies and it's effect on the rotation rates of their outer peripheries and the lack of large numbers of galaxies with significant warpage  in their planar forms would severely constrain just how 'frivolously' most any form of dark matter might be strewn around the universe.

I thought the only thing we have constrained about the distribution of dark matter around most galaxies is dark matter appears to be distributed in approximately spherically symmetrical halos substantially larger than the main concentrations of visible matter, and the rotational rate curve of visible stars in a galaxy only constrains the distribution of dark matter as a function of radius from the centre of the halo if the halo is spherical. It offers no information about the net angular momentum of each halo, or whether halos typically have any net angular momentum at all.