The big bang theory states that the universe was formed from an infinitely dense, small point called as the singularity. It was like a hot soup of matter and antimatter trying to annihilate each other. But matter had the edge and thus the beautiful world around us was formed. But the question is from where did the extra matter come from or where did the antimatter go? This apparently violates the law of conservation of mass or energy.
Now this has led scientists to come to the hypothesis of the parallel universe. If a parallel universe exists then what is the description of the universe in which we are living in? Is this universe illusion or reality?
Another argument can be put forward:- if we zoom in matter to reach the molecule level to the atom level then to the proton level and subsequently to the quarks and leptons and then the higgs boson level..............this can be continued indefinitely. By using the concept of limits we would come to a point where volume is zero or the magnitude of mass becomes zero. This again means that mass doesn't exist and thus the universe itself does not exist. this makes me ask the same eerie question again is the world, "illusion or reality?"