text: thats like asking do cars have feathers \ntime dilation is because of mass ,\nspeed is the affect  of the cause ie mass,\ntime dilation is a perception  ,a theory ,fast and slow are not equal to stopping and reversal as would be nessitated for time travel to have relivance \nappart from that remove mass there is no time ,time is not relitive in the spirit world ,because mass is non egsistant