Feature Anthropology

Out on a Limb

The science of body development may make kindling out of evolutionary trees

By Bruce Bower

- More than 2 years ago

The huge jaws and small brain case of Australopithecus robustus, which lived around 2.5 million years ago, may have derived from relatively minor genetic changes to its teeth. Institute of Human Origins
Australopithecus boisei, dating to about 1.5