|Two femora, on the left is a large, presumably male specimen and on the right is Lucy...|
Lucy and other members of the early hominid species Australopithecus afarensis probably were similar to humans in the size difference between males and females, according to new research.
"Previous convention in the field was that there were high levels of dimorphism in the Australopithecus afarensis population," said Philip Reno, assistant professor of anthropology, Penn State. "Males were thought to be much larger than females." [...] sciencedaily.com