We are all familiar with the Law of Conservation of Energy: Energy cannot be created nor destroyed In other words, the total energy in a closed system is constant. But if the above "axioms" are correct, how does it cope with the existence of virtual particles? In quantum physics, events are described by probability,which means the advent of an event can only be described as "likely" or "unlikely" to happen, but not "impossible". The chance that virtual particles been detected is miniscule, but it does happen, they are created due to the large uncerntainty of energy fluctuation in a very short time interval. What it struck me is the existence of these enigmatic particles but what is more amusing is that it has negative energy and mass, and it just pops out of nowhere in vacuum and disappears in the next moment. Surely this phenomena violates the Law of Conservation of Energy - "Energy cannot be created nor destroyed", but on the other hand, it might not have for the law of Conservation of Energy also states the total energy in a closed system is constant. Since virtual particles pertain negative energy and mass in vacuum, at the instant a virtual particle appears, another "real" particle would also appear in another place in the system to balance the amount of energy in the system.