Lays had worked tirelessly on exploring the true depths of the machine Sector Seven kept hidden and he had made astounding discoveries . While no one knew what a nanite was back then , Lays had filled several note books with details of what he perceived as tiny machines that rebuilt the section of the skin he had removed from Ice Man . While frozen , the nanites were dormant . When they were exposed to any kind of energy , be it solar , atomic , or otherwise , they would revive and try to repair the damage done . Lays had died in 1988 , still a scientist for Sector Seven even as he had already reached the amazing age of ninety - five .

Why is Sector Seven so secretive ?
None of the above choices .