For us taking decisions is like going backwards in a train, can only see what lies behind. We try to reconstruct all the future infinite possibilities. But still we are finite in our perception and body experience. And all the experiences leave traces, in and out.
The many-worlds interpretation is an interpretation of quantum mechanics that asserts the objective reality of the universal wavefunction and denies the actuality of wavefunction collapse. Many-worlds implies that all possible alternate histories and futures are real, each representing an actual "world" (or "universe"). In lay terms, the hypothesis states there is a very large-perhaps infinite-number of universes, and everything that could possibly have happened in our past, but did not, has occurred in the past of some other universe or universes.
Another speculation is that the separate worlds remain weakly coupled (e.g., by gravity) permitting "communication between parallel universes". A possible test of this using quantum-optical equipment is described in a 1997 Foundations of Physics article by Rainer Plaga. It involves an isolated ion in an ion trap, a quantum measurement that would yield two parallel worlds (their difference just being in the detection of a single photon), and the excitation of the ion from only one of these worlds. If the excited ion can be detected from the other parallel universe, then this would constitute direct evidence in support of the many-worlds interpretation and would automatically exclude the orthodox, "logical", and "many-histories" interpretations.
Wandering around these ideas we are building (im) possible lives.
We wonder as human do, trying to corner the problem, putting it away from everything else and then back in the middle of chaos, leaving traces not to get lost in time and space and keeping track of what the body remembers.