When_the_losties_went_back_to_1954,_some_of_them_(Froghurt,_some red-shirts,_etc)_were_killed_by_the_others._This_has_created_a_paradox: they_died_before_they_were_born._There_is_potential_that_this_could_ destroy_the_universe_(don’t_understand_the_physics_behind_it,_though). I_welcome_your_comments.