Fossil teeth from Ethiopia are presented that look very similar to those of a modern gorilla, despite being 10 million years old. If the teeth, assigned to a new species of fossil ape, come from a creature on the gorilla lineage, then the divergence between gorillas and the chimp–human stock must have happened before that time, constraining divergence dates reached through the comparison of contemporary genetic sequences.
- Gen Suwa
- Reiko T. Kono
- Yonas Beyene