As stated in SR, mass of the object increases with its velocity right? Lets assume that all the objects in the universe have consciousness and they all know what their rest mass is...(Leave photons out of the argument).. And also assume they all can measure their own mass at any instant... Since they all have mass, they surely can find whether they are moving, accelerating or at rest at any instant of time.. So this means that mass is the absolute frame of reference of the universe, dont u think? If the above statement is true then there is no need for relativity as the objects always know when they are moving and when they are at rest... From the mass variance formula you can even calculate your own velocity... Any thoughts about where i went wrong? Thanks in advance.. RA..