Quote:
Originally Posted by White Fox
Dark matter is still a bit on the theoretical side of science. It's not a question of whether or not it exists, but whether or not the amount of it exists that would be necessary to keep the universe expanding at an increasing rate.
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I don't think it's even confirmed to exist. It sounds to me they don't really know what's causing it, they're justing using the name dark energy so they have something to refer to the phenomenon by.