An experiment by Australian scientists has proven that what happens to particles in the past is only decided when they are observed and measured in the future. Until such time, reality is just an abstraction.
Quantum physics is a weird world. It studies subatomic particles, which are the essential building blocks of reality. All matter, including ourselves are made up of them. But, the laws governing the tiny microscopic world seem to be different to those dictating how larger objects behave in our own macroscopic reality.
Quantum laws tend to contradict common sense. At that level, one thing can be two different things simultaneously and be at two different places at the same time. Two particles can be entangled and, when one changes its state, the other will also do so immediately, even if they are at opposite ends of the universe – seemingly acting faster than the speed of light.