Or wormhole. Is that possible?
And if you didn't, you should watch "Interstellar"
Most Helpful Guy
In theory, yes, they can exist, but are fantastically unstable. However, we really don't know enough about cosmology to be sure of the possibility of them. Seriously, our physics is not thoroughly robust enough to be able to be certain of such things and we won't be for a very long time because to prove and verify such things would involve being in distant space.1
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