Belmaker notes that sites elsewhere in Eurasia suggest migrations by two different hominin populations, using Oldowan and Acheulean tool technologies at the same time.
“I’m very impressed that the Oldowan and Acheulean tools overlapped in time and space for 200,000 years, with excellent dating,” says Belmaker. “I think that is very interesting.” She says two different early human species may have also overlapped while dwelling in these highlands, and each utilized a different toolkit. Belmaker notes that sites elsewhere in Eurasia suggest migrations by two different hominin populations, using Oldowan and Acheulean tool technologies at the same time. Something similar might have happened as humans moved into the highlands. “Early Homo was beginning to travel both north and south,” she says. “What’s nice about this paper is that it adds another dimension to this expansion, which is up.”