If multiple universes exist, they may collide with each other and leave behind signs in the cosmic microwave background radiation, researchers say.
CREDIT: Stephen Feeney/UCL
Is our universe just one of many? While the concept is bizarre, it's a real possibility, according to scientists who have devised the first test to investigate the idea.
The potential that we live in a multiverse arises from a theory called eternal inflation, which posits that shortly after the Big Bang that formed the universe, space-time expanded at different rates in different places, giving rise to bubble universes that may function with their own separate laws of physics.
The idea has seemed purely hypothetical, until now. In a new study, researchers suggest that if our universe has siblings, we may have bumped into them. Such collisions would have left lasting marks in the cosmic microwave background (CMB) radiation, the diffuse light left over from the Big Bang that pervades the universe, the researchers say.
Read More: http://www.livescience.com/15530-multiverse-universe-eternal-inflation-test.html
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