Dark matter behaves pretty convincingly like large clumps of matter that,
aside from not interacting with normal matter via non-gravitational forces,
obeys the same sort of dynamical laws as any other form of matter, see the
following for a good quick summary (note particularly the stuff about the
colliding galaxy clusters whose dark matter halos seemed to "outshoot" the
position of the visible clusters themselves, since the visible matter like
stars is slowed down via friction with gas and dust during the collision,
but friction is an electromagnetic interaction so dark matter should be
impervious to it):

http://scienceblogs.com/startswithabang/2010/06/24/convincing-a-young-scientist-t/


On Wed, Nov 27, 2013 at 7:40 AM, Telmo Menezes <te...@telmomenezes.com>wrote:

> Hi all,
>
> Honest question: isn't "dark matter" a fancy name for failed predictions?
>
> Cheers,
> Telmo.
>
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