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It’s the most mysterious “stuff” our Universe has. So why are we so sure it’s real? “The Universe is made mostly of dark matter and dark energy, and we don’t know […]
Could the Universe have been born completely uniform and still given rise to us? “First, you should check out my house. It’s, like, kinda lame, but way less lame than, like, […]
How we know some galaxies have more than others. “Motions of the stars tell you how much matter there is. They don’t care what form the matter is, they just tell […]