(May 8, 2009 at 2:16 am)g-mark Wrote: It passes through everything we know on earth at billions of particles every second, yet no one has ever gotten a direct detection of this mysterious dark substance.
I don't think this is true. It's neutrinos you're thinking about here, I think.
(that's a lot of thinks
)All we know about dark matter is that something with gravitational mass makes up a large portion of galaxies, because they orbit faster than they should if they contained only the observable mass (stars).
As far as I know, we don't know whether it's in localised areas or "passing through everything". Since it's untedectable, surely this can't be known?
Galileo was a man of science oppressed by the irrational and superstitious. Today, he is used by the irrational and superstitious who claim they are being oppressed by science - Mark Crislip
