What potential empirical evidence might exist if another universe brushed against ours?

Answer

An 'imprint' or bruise on our Cosmic Microwave Background radiation.

The text suggests that interaction with another universe might leave a detectable physical mark on the oldest light observable in our cosmos, the Cosmic Microwave Background radiation, although no definite evidence of such an event has been found.

What potential empirical evidence might exist if another universe brushed against ours?

#Videos

How Many Universes Are There? - YouTube

How many universes are there? - Chris Anderson - YouTube

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