hi everybody how are you? this is the first time i write here , i hope i be good frind for you , & i'm sorry about my language , but i think i'm not very bad . i have a quetion about the special theory of relativity? Einstein sied" when the speed is increase the mass is increasing too. & the volume & tall is decrease". if this right , so can any one explain to me how can i imagine the increasing of mass & decreasing of volume or tall? please. i'm sorry agian. & good bye.