>>14200981multiverse is real but only on the quantum level, it functionally ceases to exist at the atomic scale. it works like this:
particles vibrate on a 4th axis perpendicular to time, meaning that at any static point in time, a particle is continuously alternating between a set range of points(aka the quantum wave function). the number of states is determined by the energy level of the particle; the higher the energy, the larger the waveform, the more positions in 3D space it can conceivably exist in. when we make an active attempt to measure a particle, we can only perceive the measurement of a single slice of this time-perpendicular waveform, which grants positional certainty to the measurement and creates the phenomenon of wave collapse.
what an atom represents is statistical certainty, wherein there is a near 100% guarantee that all or most of the particles will exist within the boundaries of the atom. the small chance that one or more particles WON'T exist within that boundary is what causes seemingly random things like radioactive decay. in the atomic state, the probability of the wave form ceases to be statistically relevant, and as you add atoms this irrelevance only increases until the 4th, time-perpendicular dimension might as well not exist, which is why we can't perceive it.