▁the ▁fif teenth ▁year , ▁real izing ▁that ▁their ▁experiment ▁is ▁about ▁to ▁be ▁investig ated , ▁Jean ▁wor ries ▁what ▁may ▁happen ▁to ▁the ▁children , ▁now ▁young ▁adult s , ▁when ▁the ▁government ▁disco vers ▁them . ▁The ▁experiment ▁was ▁a ▁success — to o ▁much ▁of ▁a ▁success . ▁Not ▁only ▁have ▁they ▁raised ▁ment ally ▁gift ed ▁people , ▁they ▁have ▁given ▁rise ▁to ▁a ▁new ▁race ▁of ▁super - int ellig ent ▁dem ig ods . ▁Jean ▁fear s — correct ly — that ▁the ▁government ▁will ▁react ▁with ▁fear ▁and ▁destroy ▁the ▁advanced ▁super - race . ▁The ▁children , ▁though ▁incred ibly ▁advanced , ▁are ▁in cap able ▁of ▁violence , ▁even ▁in ▁self - def ense . ▁ ▁Jean ▁is ▁able ▁to ▁obtain ▁a ▁three - year ▁extension , ▁and ▁then ▁another ▁of ▁a ▁few ▁weeks ▁when ▁the ▁three ▁years ▁exp ires . ▁In ▁that ▁time , ▁the ▁children , ▁now ▁able ▁to ▁tele path ically ▁reach ▁the ▁entire ▁Earth ' s ▁population , ▁build ▁a ▁defense ▁mechanism ▁which ▁resulted ▁in ▁the ▁gray ▁bar rier ▁E gg erton ▁described . ▁Jean ▁reve als ▁that ▁the ▁bar rier ▁is ▁based ▁on ▁time : ▁the ▁Earth ▁outside ▁the ▁shield ▁is ▁a ▁fraction ▁of ▁a ▁mill isecond ▁in ▁the ▁future . ▁They ▁can ▁pass ▁outside ▁without ▁any ▁difficulty . ▁And ▁though ▁they ▁can ▁also ▁get ▁back ▁in , ▁Jean ▁doesn ' t ▁disc lose ▁how ▁this ▁is ▁done . ▁ ▁While ▁cut ▁off ▁with ▁the ▁shield , ▁the