http://www.bigthink.com/adobe/Logo_250X250.jpg http://www.bigthink.com/adobe/Background_1024X576.jpg http://www.bigthink.com/adobe/Banner_686X60.jpg http://www.bigthink.com/adobe/Half-Banner_234X60.jpg http://www.bigthink.com/adobe/Logo_250X250 http://www.bigthink.com/adobe/Logo-Watermark_250X250.jpg http://www.bigthink.com/adobe/Background_1024X576.jpg http://www.bigthink.com/adobe/Half-Banner-ALT_234X60.jpg Bigthink http://www.bigthink.com/feed/rss/comment/idea/10234 Fri, 25 Jul 2008 17:19:19 +0100 FeedCreator 1.7.2 http://www.bigthink.com/science-technology/space-time/10234 Wikipedia has something of an explanation.<br /><br />I think that Dark Matter falls under the heading of 'work in progress' among astrophysists. Bigthink Thu, 01 May 2008 22:07:39 +0100 http://www.bigthink.com/science-technology/space-time/10234/#16235