The multiverse

History of the concept

In Dublin in 1952, Erwin Schrödinger gave a lecture in which he jocularly warned his audience that what he was about to say might "seem lunatic". He said that when his equations seemed to describe several different histories, these were "not alternatives, but all really happen simultaneously".

The American philosopher and psychologist William James used the term "multiverse" in 1895, but in a different context.The term was first used in fiction and in its current Physics context by Michael Moorcock in his 1963 SF Adventures novella The Sundered

Search for evidence

Around 2010, scientists such as Stephen M. Feeney analyzed Wilkinson Microwave Anisotropy Probe (WMAP) data and claimed to find evidence suggesting that our universe collided with other (parallel) universes in the distant past.However, a more thorough analysis of data from the WMAP and from the Planck satellite, which has a resolution 3 times higher than WMAP, did not reveal any statistically significant evidence of such a bubble universe collision.In addition, there was no evidence of any gravitational pull of other universes on ours.