Two-million-year-old fossils including the three tiny bones of the middle ear are helping scientists figure out the auditory abilities of early human ancestors at a time when they were beginning to hear more like a person and less like a chimpanzee, NBC News reported.
A study published on Friday involving two species from South Africa, Australopithecus africanus and Paranthropus robustus, showed they boasted better hearing than either chimps or people in a frequency range that may have facilitated vocal communication in a savanna habitat.
