▁ant ler ▁with ▁bar bed ▁hook s ▁on ▁one ▁or ▁both ▁sides . ▁Animal ▁b ones ▁include ▁m amm oth , ▁wild ▁horse , ▁rein de er ▁and ▁cave ▁bear . ▁Sm ashed ▁human ▁sk ull ▁fragments ▁with ▁traces ▁of ▁expos ure ▁to ▁fire ▁were ▁repeatedly ▁regarded ▁as ▁evidence ▁of ▁can n ib al ism , ▁but ▁according ▁to ▁Gustav ▁R iek , ▁the ▁lack ▁of ▁pow der ed ▁och re ▁is ▁ ▁evidence ▁that ▁ex cludes ▁head ▁bur ial s . ▁Nevertheless , ▁the ▁theory ▁of ▁can n ib al ism ▁has ▁not ▁entirely ▁been ▁rep udi ated . ▁The ▁ske let al ▁remains ▁of ▁the ▁central ▁fire place ▁in ▁the ▁Mag d alen ian - layer ▁IV ▁had ▁been ▁arranged ▁in ▁deliber ate ▁bur ial ▁fashion . ▁ ▁Ne ol ith ic ▁and ▁Bron ze ▁Age : ▁In ▁the ▁heavily ▁mixed ▁upper ▁layers ▁II ▁and ▁I , ▁Ne ol ith ic ▁as ▁well ▁as ▁Early ▁and ▁Late ▁Bron ze ▁Age ▁cer am ic ▁v asc ular ▁and ▁wall ▁sh ards ▁were ▁found . ▁ ▁Some ▁layers ▁were ▁perman ently ▁destroyed ▁during ▁the ▁various ▁exc av ations . ▁Non eth eless , ▁the ▁cave ▁still ▁holds ▁potential ▁value ▁for ▁future ▁arch ae olog ists , ▁since ▁some ▁areas ▁formerly ▁de emed ▁" un product ive " ▁have ▁still ▁remained ▁un touch ed . ▁In ▁order ▁to ▁preserve ▁these ▁und ocument ed ▁areas , ▁the ▁cave ▁was ▁protected ▁by ▁an ▁arm ored , ▁l att iced ▁gate , ▁to ▁prevent ▁access ▁but ▁enable