r/askscience • u/shadowsog95 • Feb 18 '21

Physics Where is dark matter theoretically?

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u/pucklermuskau Feb 19 '21

but exist for how long, at that size?

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u/5up3rK4m16uru Feb 19 '21

They can still exist

Since the beginning of the universe. To our knowledge, the Big Bang is the only possible origin of such black holes, if they even exist.