Quote:
Originally posted by DA Morgan:
In a sense we can observe it ... but we don't know what causes it.

An analogy I would use is like watching leaves moving on a tree when you don't know about wind. You can see the wind's effect. You can propose that the air is moving. But until you actually climb up the tree and measure wind movement you can't be sure.
Like observing Brownian motion before Einstein came along? Even Einstein's modelling of this effect has not made molecules observable, but it fitted so well that everybody accepted their existence afterwards. Dark matter gives a simple explanation except for the fact that it seems that other matter moves freely "through" it. Could dark matter not be large entangled boson-waves with mass?

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