Early view. An artist's rendition of Ardipithecus ramidus Credit: © 2009, J. H. Matternes @ Science. Looking Old? Ya, but given his age 4.4 million years, he is quiet ok

The science magazine on 2nd October unveils an article about 11 papers, authored by a diverse international team, describing an early hominid species, Ardipithecus ramidus, and its environment. Click here to have a look on the sciences' website.

The Ardipithecus ramidus or shortly called "Ardi" by the scientists lived about some 4.4 million years ago in Ethopia and occupies the place of being the earliest known hominid ancestor. (No ideas how many "Greats" before Our Great Grand fathers .

Researchers have unveiled the oldest known skeleton of a putative human ancestor--and it is full of surprises. Although the creature, named Ardipithecus ramidus, had a brain and body the size of a chimpanzee, it did not knuckle-walk or swing through the trees like an ape. Instead, "Ardi" walked upright, with a big, stiff foot and short, wide pelvis, researchers report in Science. "We thought Lucy was the find of the century," says paleoanthropologist Andrew Hill of Yale University, referring to the famous 3.2-million-year-old skeleton that revolutionized thinking about human origins. "But in retrospect, it was not."

 Until now, the oldest known skeleton of a human ancestor was Lucy, who proved in one stroke that our ancestors walked upright before they evolved big brains. But at 3.2 million years old, she was too recent and already too much like a human to reveal much about her primitive origins. As a result, researchers have wondered since her discovery in 1974, what came before her--what did the early members of the human family look like?

Now, that question is being answered in detail for the first time. A multinational team discovered the first parts of the Ar. ramidus skeleton in 1994 in Aramis, Ethiopia. At 4.4 million years old, Ardi is not the oldest fossil proposed as an early hominin, or member of the human family, but it is by far the most complete--including most of the skull and jaw bones, as well as the extremely rare pelvis, hands, and feet. These parts reveal that Ardi had an intermediate form of upright walking, a hallmark of hominins, according to the authors of 11 papers that describe Ardi and at least 35 other individuals of her species. But Ardi still must have spent a lot of time in the trees, the team reports, because she had an opposable big toe. That means she was probably grasping branches and climbing carefully to reach food, to sleep in nests, and to escape predators.

Source : Science Website , Click here for Photo Gallery of our great Ancestor on Science Magazine.