teeth
Fossil profile: AL 400-1 mandible and the curving line of human evolution
Australopithecus afarensis was an early member of the hominin lineage, but it was not intermediate between humans and living great apes in all ways.

An unusual rate of dental chipping may give clues about Homo naledi's diet
Research by Ian Towle and coworkers finds that Homo naledi may have been eating foods with lots of grit.

Why are humans evolving to lack their wisdom teeth?
The frequency of M3 agenesis varies greatly among human populations. It may have to do with agricultural diets, but anthropologists aren't sure.