Ethiopian Fossils Show Homo and Australopithecus Coexisted 2.6-2.8 Million Years Ago
Updated
Updated · ScienceDaily · May 16
Ethiopian Fossils Show Homo and Australopithecus Coexisted 2.6-2.8 Million Years Ago
1 articles · Updated · ScienceDaily · May 16
Thirteen fossil teeth from Ethiopia’s Ledi Geraru site indicate early Homo and an unidentified Australopithecus species lived in the same region about 2.6 to 2.8 million years ago.
The teeth were found in sediments bracketed by volcanic ash layers, letting researchers date the fossils and rule out Australopithecus afarensis—Lucy’s species—as the later-surviving australopith.
The find strengthens evidence that human evolution was not a straight ape-to-human sequence but a branching tree, with multiple hominin lineages overlapping in eastern Africa during a critical period.
Ledi Geraru had already yielded a 2.8 million-year-old Homo jaw and some of the earliest Oldowan stone tools, and researchers are now studying tooth enamel to test whether the species shared diets or competed for resources.
If multiple human ancestors shared the same land, did they interact, and why did only one lineage survive?
What drove the explosion of hominin diversity 3 million years ago, and why did it eventually collapse?
Groundbreaking 2.8–2.6 Million-Year-Old Fossils from Ledi-Geraru Show Multiple Hominin Species Coexisted in Early Human Evolution
Overview
Recent research at Ethiopia's Ledi-Geraru site has led to major breakthroughs in our understanding of early human evolution. Scientists discovered 13 fossilized teeth, belonging to both early Homo and a previously unknown Australopithecus species. These fossils were precisely dated to between 2.8 and 2.6 million years ago by analyzing volcanic ash layers. The findings, published in a leading scientific journal, show that multiple hominin species lived together in the same region during this critical period. Ongoing fossil searches at Ledi-Geraru continue to reveal the complex and diverse story of our ancient ancestors.