F. Spoor, M. G. Leakey, P. N. Gathogo, F. H. Brown, S. C. Anton, I. McDougall, C. Kiarie, F. K. Manthi & L. N. Leakey (9 August 2007). «Implications of new early Homo fossils from Ileret, east of Lake Turkana, Kenya». Nature448 (448): 688–691. doi:10.1038/nature05986. PMID17687323.
nih.gov
ncbi.nlm.nih.gov
F. Spoor, M. G. Leakey, P. N. Gathogo, F. H. Brown, S. C. Anton, I. McDougall, C. Kiarie, F. K. Manthi & L. N. Leakey (9 August 2007). «Implications of new early Homo fossils from Ileret, east of Lake Turkana, Kenya». Nature448 (448): 688–691. doi:10.1038/nature05986. PMID17687323.
nytimes.com
New York Times article Fossils in Kenya Challenge Linear Evolution published August 9, 2007 says "Scientists who dated and analyzed the specimens — a 1.44 million-year-old Homo habilis and a 1.55 million-year-old Homo erectus — said their findings challenged the conventional view that these species evolved one after the other. Instead, they apparently lived side by side in eastern Africa for almost half a million years."
