'Lucy's baby' found in Ethiopia

The 3.3-million-year-old fossilised remains of a human-like child have been unearthed in Ethiopia's Dikika region.

The female bones are from the species Australopithecus afarensis , which is popularly known from the adult skeleton nicknamed "Lucy".

They believe the near-complete remains offer a remarkable opportunity to study growth and development in an important extinct human ancestor.

The skeleton was first identified in 2000, locked inside a block of sandstone. It has taken five years of painstaking work to free the bones.

"The Dikika fossil is now revealing many secrets about Australopithecus afarensis and other early hominins, because the fossil evidence was not there," said dig leader Zeresenay Alemseged, of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany.

The find consists of the whole skull, the entire torso and important parts of the upper and lower limbs. CT scans reveal unerupted teeth still in the jaw, a detail that makes scientists think the individual may have been about three years old when she died.

Remarkably, some quite delicate bones not normally preserved in the fossilisation process are also present, such as the hyoid, or tongue, bone. The hyoid bone reflects how the voice box is built and perhaps what sounds a species can produce.

Judging by how well it was preserved, the skeleton may have come from a body that was quickly buried by sediment in a flood, the researchers said.

"In my opinion, afarensis is a very good transitional species for what was before four million years ago and what came after three million years," Dr Alemseged told BBC science correspondent Pallab Ghosh.

"[The species had] a mixture of ape-like and human-like features. This puts afarensis in a special position to play a pivotal role in the story of what we are and where we come from."

This early ancestor possessed primitive teeth and a small brain but it stood upright and walked on two feet.

There is considerable argument about whether the Dikika girl could also climb trees like an ape.

This climbing ability would require anatomical equipment like long arms, and the "Lucy" species had arms that dangled down to just above the knees. It also had gorilla-like shoulder blades which suggest it could have been skilled at swinging through trees. But the question is whether such features indicate climbing ability or are just "evolutionary baggage".

The Dikika girl had an estimated brain size of 330 cubic centimetres when she died, which is not very different from that of a similarly aged chimpanzee. However, when compared to the adult afarensis values, it forms 63 - 88% of the adult brain size.

This is lower than that of an adult chimp, where by the age of three, over 90% of the brain is formed. This relatively slow brain growth in the Dikika girl appears to be slightly closer to that of humans.

Slow, gradual development in an extended childhood is regarded as a very human trait - probably to enable our higher functions to develop.

Professor Fred Spoor of University College London said the find would give scientists a "detailed insight into how our distant relatives grew up and behaved... at a time of human evolution when they looked a good deal more like bipedal chimpanzees than like us."

The "Lucy" skeleton, discovered in Hadar, Ethiopia, in 1974 belongs to the same species as the Dikika girl. For more than 20 years it was the oldest human ancestor known to science.

"How can a fraud have a baby?

Are you under the impression that we have only one fossil of Australopithecus afarensis?

AL 129-1, Australopithecus afarensis
Discovered by Donald Johanson in 1973 at Hadar in Ethiopia (Johanson and Edey 1981; Johanson and Taieb 1976). Estimated age is about 3.4 million years. This find consisted of portions of both legs, including a complete right knee joint which is almost a miniature of a human knee, but apparently belongs to an adult.

Note the complete knee found. This invalidates any question about 'Lucy's' knee.

Lucy AL 288-1, "Lucy", Australopithecus afarensis
Discovered by Donald Johanson and Tom Gray in 1974 at Hadar in Ethiopia (Johanson and Edey 1981; Johanson and Taieb 1976). Its age is about 3.2 million years. Lucy was an adult female of about 25 years. About 40% of her skeleton was found, and her pelvis, femur (the upper leg bone) and tibia show her to have been bipedal. She was about 107 cm (3'6") tall (small for her species) and about 28 kg (62 lbs) in weight.

Note that the pelvis (hip) is included at the same site as the rest of the fossil. The knee was not found at the same site and was never claimed to be part of "Lucy". It has always been claimed to be a fossil of a separate specimen from "Lucy". Only creationists have claimed otherwise.

AL 333 Site, "The First Family", Australopithecus afarensis?
Discovered in 1975 by Donald Johanson's team at Hadar in Ethiopia (Johanson and Edey 1981). Its age is about 3.2 million years. This find consisted of remains of at least 13 individuals of all ages. The size of these specimens varies considerably. Scientists debate whether the specimens belong to one species, two or even three. Johanson believes they belong to a single species in which males were considerably larger than females. Others believe that the larger specimens belong to a primitive species of Homo.

"Laetoli footprints", Australopithecus afarensis?
Discovered in 1978 by Paul Abell at Laetoli in Tanzania. Estimated age is 3.7 million years. The trail consists of the fossilized footprints of two or three bipedal hominids. Their size and stride length indicate that they were about 140 cm (4'8") and 120 cm (4'0") tall. Many scientists claim that the footprints are effectively identical to those of modern humans (Tattersall 1993; Feder and Park 1989), while others claim the big toes diverged slightly (like apes) and that the toe lengths are longer than humans but shorter than in apes (Burenhult 1993). The prints are tentatively assigned to A. afarensis, because no other hominid species is known from that time, although some scientists disagree with that classification.

AL 444-2, Australopithecus afarensis
Discovered by Bill Kimbel and Yoel Rak in 1991 at Hadar in Ethiopia (Kimbel et al. 1994). Estimated age is 3 million years. This is a 70% complete skull of a large adult male, easily the most complete afarensis skull known, with a brain size of 550 cc. According to its finders, it strengthens the case that all the First Family fossils were members of the same species, because the differences between AL 444-2 and the smaller skulls in the collection are consistent with other sexually dimorphic hominoids.

Above information from here

Note the completeness of the fossil and its link to the 'family' find.

"Knee & hip bones found far apart in depth and distance.

This is where we find a fraud but it isn't a fraud by scientists but by creationists. The knee was never claimed to belong to "Lucy" but to another member of her species. The form and utility of the knee can be seen in a number of other Australopithecus afarensis fossils. According to those other finds the knee is indeed from member of "Lucy's" species. You will see here that for a time the label "Lucy" was used to signify not just that specific fossil but all Australopithecus afarensis fossils.

"Assertions of common origin employed more wishful thinking than proof.

The quantity and quality of evidence for common descent is far beyond what I suspect you have considered.

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