December 19, 2010
Our Universe Bumped Into Other Universes?

The multiverse is so crowded that universes bump into each other. We need to move our universe out into a rural part of the multiverse so we can get some peace. Background cosmic microwave radiation provides evidence of whole universe collisions?

Now Stephen Feeney at University College London and a few pals say they've found tentative evidence of this bruising in the form of circular patterns in cosmic microwave background. In fact, they've found four bruises, implying that our universe must have smashed into other bubbles at least four times in the past.

We are just a bubble floating around in the multiverse?

Are there any causally identical universes which are ahead or behind us in time?

Share |      Randall Parker, 2010 December 19 11:06 AM  Space Multiverse

PacRim Jim said at December 19, 2010 8:46 PM:

Could there be a multiverse black hole that gobbles up universes? Or could there be a meta-multiverse comprising infinite multiverses? Ouch, my head hurts.

wreaver said at December 19, 2010 9:32 PM:

@PacRim Jim said,
"Or could there be a meta-multiverse comprising infinite multiverses?"

Perhaps related.... In mathematics, in set theory, you can show that there cannot exist a set of all subsets. You're meta-multiverse sounds kind of like it, so perhaps it cannot exist.

Randall Parker said at December 20, 2010 9:28 PM:

The metamultiverse can exist if it is part of something still larger. No reason to expect the next level up in containment is the final level.

Phillep Harding said at December 23, 2010 10:17 AM:

"Fender bender" on that scale? Ouch.

PacRim Jim said at May 15, 2011 5:01 PM:

Perhaps breaking the universe into levels is an artifact of limited human perception and cognition.

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