▁strange ▁eng ra ving ▁that ▁res emb les ▁a ▁key . ▁These ▁pet rog lyph s ▁can ▁be ▁abstract ▁representations ▁of ▁myth ological ▁or ▁cosm ological ▁belief s , ▁made ▁by ▁people ▁that ▁have ▁consum ed ▁ay ahu as ca ▁( y aj é ). ▁It ▁is ▁possible ▁that ▁the ▁eng ra vers ▁were ▁ancest ors ▁of ▁Hu ach ip a eri , ▁an ▁ind igen ous ▁group ▁that ▁live ▁until ▁now ▁in ▁the ▁Kos n ip ata ▁valley . ▁ ▁An ▁interesting ▁characteristic ▁of ▁the ▁Mon ol ith ▁is ▁a ▁little ▁bas in ▁possibly ▁of ▁artificial ▁origin . ▁There ▁is ▁the ▁possibility ▁that ▁the ▁bas in ▁was ▁used ▁as ▁recip ient ▁where ▁the ▁corn ▁was ▁stuff ed ▁in ▁order ▁to ▁transform ▁it ▁into ▁a ▁typical ▁Amazon ian ▁drink ▁called ▁ch icha . ▁Another ▁theory ▁is ▁that ▁the ▁little ▁bas in ▁could ▁have ▁been ▁used ▁to ▁pur ify ▁a ▁baby , ▁sub mer ging ▁him ▁inside ▁the ▁bas in ▁full ▁of ▁water . ▁ ▁References ▁▁ ▁Category : Arch ae ological ▁sites ▁in ▁C us co ▁Region ▁Category : Arch ae ological ▁sites ▁in ▁Peru ▁Category : Pre histor ic ▁art ▁Category : R ock ▁art ▁in ▁South ▁America <0x0A> </s> ▁David ▁James ▁Schw ende man ▁( Dec ember ▁ 5 , ▁ 1 9 2 4 ▁– ▁November ▁ 2 6 , ▁ 2 0 1 2 ) ▁was ▁an ▁American ▁tax id erm ist . ▁Schw ende man ▁was ▁the ▁last , ▁full - time ▁chief ▁tax id erm ist ▁for