Before 'Lucy,' there was 'Ardi': Oldest hominid skeleton provides new evidence for human evolution

In a special issue of Science, an international team of scientists has for the first time thoroughly described Ardipithecus ramidus, a hominid species that lived 4.4 million years ago in what is now Ethiopia. This research, in the form of 11 detailed papers and more general summaries, will appear in the journal's 2 October 2009 issue.

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