Even though it has been firmly tested, it is safe to say that practically no one understands the quantum mechanics. In order to explain some of the bizarre consequences of the quantum theory, mind bending ideas were being made so far.
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How, there is another new theory, called many interacting worlds, and it is as profound as it sounds. This is a theory that not only claims parallel worlds exist, but that they interact with our worlds on a quantum level.
Though this is a very volatile theory, it can give explanation to some quantum mechanic consequences that have been happening.
This is a spinoff theory to many before it, idea which presents that there are some alternative histories and futures are possible, and each of them represents a parallel world to ours.
The one sole problem about this theory is that it is an untestable one, because the observations can only be done in our world. What happens in the other parallel worlds can only be imagined.
However, scientists believe that the parallel worlds interact with our world on a certain quantum level. This is an idea that has been founded in the 1950s, and it is a well known one.
Each universe can branch into a bunch of new universes each time a measurement of the quantum is being made.
Therefore, all possibilities are realized, making it possible that in some universe, the asteroid that killed off all the dinosaurs missed the Earth, and Australia was colonized by the Portugese people.
On the other hand, critics question this particular theory, because they do not influence our world at all. This is why its approach is very different, just because of the complex nature of the theory.
Other scientists have proposed that a force of repulsion between the parallel worlds exist, so this is why our world never got into contact with another one.
They propose that the quantum effects can be explained if you factor this force. The ultimate test for this theory will be whether or not the math holds the truth.
Can it properly predict this or not? Nevertheless, this theory can help you give into the imagination in a second.
For an instance, when the people who created this theory were asked if people from different worlds will be able to interact with each other, the scientists said that it was not a part of their theory. Only the idea of communicating with another parallel worlds is not a fantasy anymore.
So, what would your life be if you have made some different choices? Maybe you can look into an alternate world one day and find it out for yourself. Do you believe that a parallel universe exists?