I feel like “dark matter” is the ether or phlogiston of our era
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Commenting as an astronomer. There is rather solid astronomical evidence for dark matter, despite that we don't understand it at all in particle physics sense. The gravitational effects are well measured. However, as long as there is no direct observation of dark matter ...
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... things remain open to interpretation. Of course this is not unusual in astrophysics, because in general we only get partial information from almost anything due to limited telescopes and the fact that a lot of dynamical phenomena change in longer time scales than human lives.
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