I just have a question relating to Mass Dilation; Mass is defined (by the dictionary) as Now, mass is a collection of particles - protons, neutrons and electrons. Mass dilation states that when approaching the speed of light, from an outside observer, the mass of the object will be recorded as being greater than that recorded by the object itself. [The way Michio Kaku says it] How could this be? This would mean that particles appear from no where from one point of view but not from another. There will be two different counts of particles from the same thing!!! Could someone please explain?