P200 Introduction to Prehistoric Archaeology

P200 Home Page | Syllabus | Reading schedule| Lecture Notes | Assignments

Evolutionary Context for the Oldest Archaeology

Part I: the early australopithecines

During the twentieth century, anthropologists have found and described a wonderful collection of fossil bones from human ancestors, and their relatives that demonstrate dramatically and conclusively that Africa was the original human home.

Members of the human family Hominidae are called hominids. The earliest hominids known so far have been found by Drs Tim White and Berhane Asfaw in Ethiopia, from a series of deposits in the northern end of the Great Rift Valley, and are estimated to be around 5 million years old.

Note how "bushy" this hominid family tree is -- this is because after the firs hominids appeared around ~5 million years ago, they began to diversify into different lineages (branches of the family tree), specializing in different ecological niches.

They also probably evolved separately in eastern and southern Africa, as all species separated by geographical barriers will eventually do.

The earliest hominids were small, ape-like "bipeds" (walked on 2 legs), called australopithecines. As described in your textbook, their bipedal footprints have been found at a site in East Africa (in Tanzania) called Laetoli.

  The australopithecines were first named by Raymond Dart, who described a juvenile skull of the first one in 1924. He named his specimen Australopithecus africanus, ("southern ape-man from Africa") and thought it had both human characteristics (small canine teeth and bipedal gait) and ape-like characteristics (small brain, projecting snout).  


For many years, most famous australopithecine was a partial skeleton of a small female Australopithecus afarensis that lived around 3 million years ago in Ethiopia, called "Lucy."

There is still considerable disagreement about which of the closely related sister species, Australopithecus afarensis or Australopithecus africanus, was most likely to be our direct ancestor. The first members of our own genus, Homo, don't appear until ~2.5 million years ago.

 

A new discovery of a skeleton in a cave deposit at the site of Sterkfontein, South Africa, may become even more famous than Lucy, because the skeleton is almost complete! The most recent major find was announced in December 1998 -- a COMPLETE skeleton of an australopithecine from the South African site of Sterkfontein, discovered by Ron Clarke and colleagues. It is just now being excavated from the wall of a cave deposit over 3 million years old, making it a southern African contemporary of east African Lucy.

Refer to the BBC online report for some of the details. See MAP of site locations. It looks like this skeleton will be assigned to the species Australopithecus africanus, the first hominid juvenile specimen described by Raymond Dart in 1924.

 

 

So, did these early australopithecines have an archaeological record?

Were they cultural animals? Did they create and use tools, or have a "material culture" that we can recognize? Raymond Dart thought so! He thought that the broken bones, the sharp teeth and horns associated with australopithecus africanus fossils in South African cave sites represented tools and weapons used by these hominids -- he called it the "Osteo-donto-keratic" culture -- and argued that they were our blood-thirsty, violent ancestors, and that the skills they acquired to capture game led to the evolution of increased intelligence in humans.

But are we sure? Let's be skeptical archaeologists. Read some STUDENT COMMENTARY on this question.

Other references:

P200 Home Page | Syllabus | Reading schedule| Lecture Notes | Assignments

 Human Origins in Africa Homebase | Archaeology Links
Sept teaching interests | Sept research | Sept personal home Page

IU Anthropology | IU Bloomington Home Page

Last updated: 29 April, 1999
URL: http://www.indiana.edu/~origins/teach/p200/xxx.html
Comments: sept@indiana.edu

Copyright Jeanne Sept 1998 : do not cite without permission