If we live in a multiverse why do other universes not collide with ours

Published: January 25, 2010

This artist's concept illustrates the idea that other universes may be plentiful and diverse.

Photo by NASA/JPL-Caltech

Any future collision between our observable universe and a bubble universe will presumably happen on cosmological timescales — tens of billions of years or longer. It is also possible that our observable universe collided with another bubble universe in the past.

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