OK, This is really a question for Mr. Rick Sternbach Rick Sternbach Rick Sternbach (which I believe is the approved way to attract his attention - if not please only set phasers on setting 1) but I welcome anyone's ideas. On to the question: Why does the TNG era Federation use deuterium/anti-deuterium in it's matter/antimatter reactors? The reason I ask is that it would seem simpler to find/make straight hydrogen/anti-hydrogen and the reaction products are cleaner. I know that deuterium is fusion fuel both burning with itself (D-D) or with tritium (D-T) so I understand that carrying some for fusion makes sense. Straight up hydrogen is tougher to fusion burn. D-T's the easiest fusion fuel to burn and D-D's not bad...given Star Trek levels of technology that is... I know I'm digging hard at the real science behind the show. If the answer to my question is "because it sounded cool" or "because DAEDALUS used it" then cool. The only reason I ask is because the TNG TechMan and other works indicate that Mr. Sternbach has a better than average grasp of nuclear rocketry and it stuck me as odd. v/r feld PS. oh. and Hi! First post and all that.