Little Foot Finally Extricated

Nature News is reporting on the excavation and description of "Little Foot," a fossil initially discovered twenty years ago by Ron Clarke, at Sterkfontein Cave, in South Africa.  Colin Barras writes:

After a tortuous 20-year-long excavation, a mysterious ancient skeleton is starting to give up its secrets about human evolution.

The first of a raft of papers about ‘Little Foot’ suggests that the fossil is a female who showed some of the earliest signs of human-like bipedal walking around 3.67 million years ago. She may also belong to a distinct species that most researchers haven’t previously recognized.

“It’s almost a miracle it’s come out intact,” says Robin Crompton, a musculoskeletal biologist at the University of Liverpool, UK, who has collaborated with the research team that excavated the skeleton.

Why has this task taken so long and why is it so important? Barras continues:

By late last year, Clarke’s team had successfully removed enough bones to reconstruct more than 90% of the skeleton, and the specimen was unveiled to the world. No other Australopithecus fossil comes close to that level of completeness. For comparison, the most famous Australopithecus — Lucy — is around 40% complete.

Clarke and colleagues have posted a number of papers on the BiorXiv biology pre-print server. One of the papers is titled "The skull of StW 573, a 3.67 Ma Australopithecus skeleton from Sterkfontein Caves, South Africa."  Because these papers are unpublished, they are open-access. 

As Clarke and Kuman notes, this fossil is unlike those of Australopithecus africanus, a species ubiquitous in South Africa but more closely resembles, in some ways, Au. afarensis (Lucy) and Au. anamensis, both of which are north east African variants of Australopithecus and are the earliest members of that genus.  The fossil has been included, taxonomically, with a species originally described by Raymond Dart in 1948: Australopithecus prometheus.  Given its early date, the researchers argue that it cannot be descended from Au afarensis but must be coeval with it.  This suggests that both are descendants of an earlier species that had a large home range. 

More pieces to the puzzle. 

Phillip Tobias Has Died

Phillip Tobias, a preeminent anthropologist who worked tirelessly to raise the standard for palaeoanthropology in South Africa, has died. From the Scotsman:

But for Tobias’ endeavours, the honours would probably have gone to East Africa, the territory of the more famous Leakey team, Louis and Mary. The Leakeys were great self-publicists and they made sure that East African discoveries – especially those they made in the Olduvai Gorge in Kenya’s Rift Valley – featured prominently in international media at a time when South Africa was mostly renowned for its apartheid policies.

However, Tobias, who was an anti-apartheid activist as well as a distinguished scientist, lived long enough to see the tide turn and South Africa take centre stage in the great debate on humanity’s origins. The huge shift in perceptions was largely Tobias’ doing. It was no mean feat to keep the torch alight for evolutionary studies in a land governed by white right-wing Christian fundamentalists who passionately dismissed the idea of evolution.

Tobias was partly responsible for the changes in attitudes in South Africa that led to the downfall of apartheid and, along with many biological anthropologists of the time, championed the idea that race, as a biological concept, is meaningless. He will be missed.

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