what would happen if a alien species could take the energy that is transferred to the mass of the ship when approaching the speed of light, as i understand it, and transfers this energy to the engines or the propulsion of the ship, which of course uses this energy and therefore the mass of the ship does not actually increase but stays the same. all they would have to do is have the ability to keep up with the transfer of the energy from the speed of light to the propulsion system.

therefore an alien has learned how to transfer the energy at the speed of light from increasing its ships mass and transfer this enrgy to the propulsion system. therefore keeping the mass of the ship constant. the implications!!......

just thinking!!