Niba utekereza ko urugamba rwabagabo rwo gukuraho umusatsi wo mumaso arirwo rugezweho, dufite amakuru yawe. Hariho ibimenyetso byubucukuzi byerekana ko, mugihe cyanyuma cyibuye, abagabo biyogoshesha ibishishwa bya flint, obsidian, cyangwa clamshell, cyangwa bakoresheje clamhells nka tewers. (Ouch.) Nyuma yaho, abagabo bagerageje umuringa, abapolisi ...
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