Did earliest human ancestors have more apelike faces?
But the findings, based on a reconstructed 1.9-million-year-old skull, are highly controversial among the anthropological community.
New computer-generated reconstructions suggest that the specimen had a smaller brain than scientists had believed as well as a distinctly protruding jaw.
"We see in this new reconstruction primitive features that are carryovers from what may be its Australopithecus ancestor," said study author Timothy Bromage, an adjunct professor at New York University College of Dentistry...
But other experts expressed skepticism about Bromage's argument that the repositioning of the specimen's face means its brain size must have been smaller.
"It's probably right that the face should stick far more forward. But to say that because they've changed the angle of the face, the brain size has to get smaller doesn't make any sense," said Robert Martin, a biological anthropologist at the Field Museum in Chicago, Illinois.
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Dale B. Light - 4/11/2007
Before accepting this very iffy reconstruction, read John Hawks' critique here.