Gobero sites in Niger document 5000 years of Green Sahara human occupation. Kiffians arrived 9700 years ago and lived on paleodune by lake. Kiffians were tall robust people. Kiffians hunted with microlith spears and bone harpoons. Kiffians fished lake teeming with fish and crocodiles. Kiffians made pottery with parallel wavy lines. Drought hit 8000 years ago drying lake and emptying area. Tenereans recolonized 7000 years ago on same dune. Tenereans shorter stature and lighter build than Kiffians. Tenereans middens contain clams small fish antelope and rare cow bones. Tenereans tended domesticated livestock. Tenereans hunted with bows and arrows. Tenereans wore eggshell ivory necklaces and bracelets. Tenereans stamped pottery with pitted or zigzag patterns. Aridification began 4500 years ago ending permanent settlement. Nomads later migrated through leaving hearths and undecorated pottery.