According to Colin Groves, a professor in the School of Archaeology and Anthropology at the Australian National University in Canberra, "Here were a number of distinctive, perhaps short-lived, species of proto-humans living in both eastern and southern Africa in the period between 2 and 1 million years ago."
Menurut Colin Groves, profesor di Jurusan Arkeologi dan Antropologi di Australian National University di Canberra, "Ini adalah sejumlah spesies berbeda, mungkin berumur pendek, dari proto-manusia hidup di timur dan selatan Afrika dalam periode antara 2 dan 1 juta tahun lalu."