The paradigm that young neutron stars ( NSs ) evolve as rapidly rotating Crab-like pulsars requires re-examination .
Evidence is accumulating that , in fact , many young NS are slowly rotating ( P \sim 10 -s ) X-ray pulsars , lacking in detectable radio emission .
We present new results on three radio-quiet NS candidates associated with supernova remnants , which suggests that alternative evolutionary-paths exist for young pulsars .
These include the 12-s pulsator in Kes 73 , the 7-s pulsar near Kes 75 , and the enigmatic X-ray source in RCW 103 .
We postulate that such objects account for the apparent paucity of radio pulsars in supernova remnants .