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http://www.physorg.com/news167555163.htmlIt has been suspected for quite a while that there is more matter than what is known about, in stars, interstellar dust and gas, and even black holes. As more accurate measurements become available, the evidence becomes ever more compelling for this "dark matter". The main idea is that some unknown matter makes itself known through its gravitation - for example, our galaxy rotates much too fast for the amount of matter that is actually known.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
