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How do we know that dark matter isn't...
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How do we know that dark matter isn't just a bunch of dyson spheres?
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>>7794516

How do we know anything bro?
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How do we know that dark matter isn't matter hidden away in additional spacial dimensions that we can't access or interact with?
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>>7794536
Am I even??
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>>7794516
Pretty sure they would fall under MAssive Compact Halo Objects. MACHOs have been detected by looking for gravitational microlensing, but there don't seem to be enough of them to account for more than a small fraction of the dark matter around.
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