Skull comparison: Australopithecus afarensis vs modern humans
The skull of (a) Australopithecus afarensis, an early hominid that lived between three and four million years ago, resembled that of (b) modern humans, but was smaller with a sloped forehead and prominent jaw.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, The Evolution of Primates. October 17, 2013."
http://cnx.org/content/m44696/latest/Figure_29_07_04ab.jpg
OpenStax CNX
CC BY 3.0.
