How do we know that dark matter is anything more than normal matter that we just can't see or detect (due to size, distance, temperature)?
Posted in the other thread, as well, but just for reference:
https://www.theguardian.com/science/2017/oct/12/astronomers-find-half-of-the-missing-matter-in-the-universe
@Oliver Schick started
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How do we know that dark matter is anything more than normal matter that we just can't see or detect (due to size, distance, temperature)?