Turning two feet instead of four is an important moment in the evolution of our species, so scientists want to make it quite clear when it happened, and a new study on this adaptation about 7 million years before it happens.
It is based on a detailed analysis of the thighs of thighs (females) and the arms (alna) of the oldest representative of humanity, sohalanthrops. These fools were first discovered in 2001 in Chad’s Torus-Menila.
At the same time, these early homenines are likely to also work to climb the tree using the four organs, as expected if the species gradually changed two legs with four legs.
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Write to the researchers in their published articles: “Here we offer evidence after the locomotor behavior of S. C. C. C. C. Write in the dissertation.
When comparing the thighs and fossils of the arms with equal bones of humans, chimpanzees and guerrillas, the researchers managed to discover how they were used and this species (on their “locomotor mode”) how I moved
A total of 20 different characteristics of fossil bones were used to prove if S. C. C. C. C. Chednis works with two feet or four, including the external shape and internal structure of the remains, which is evaluated through microtomography images.
He concluded that the “usual bipolation” is probably with some trees climbing.
The team also suggests that there is a difference between the methods of climbing the trees of the species against today’s guerrillas and the chimpanzee: with a strong grip of the hand instead of leaning on the bones of the finger and feet.
The researchers write: “Alna’s rotation and the geometric characteristics of the cross section … instead of dimensional coordination, they indicate the behavior of the habit of the sand, including climbing and/or ‘cautious climbing’ escalation.”
In this study, the first study of the fiance of the skull has been excavated in the same place and is also related to S. C. C. The analysis of the skull establishes that these creatures such as monkeys are bilateral, but now there is more complete evidence.
The history of Jovashim is since then (between 6 and 8 million years) that humans are genetically separated from chimpanzee and bonobos, which are our closest living relatives, so this is an important step, and this is a step So important that it has already attracted a lot of scientist. Controversy
These first homelands probably lived in an environment that mixed forests, palm drains and grass fields, both walked on two legs and made the trees for them when they were looking for food and water.
Write to researchers: “The most irrazonable assumption is that post -cranial morphology is a sign of the bipolaity of post -cranial morphology, and that any other assumption for the sets offered by Chad will have less explanatory power,” writers write .
Research has been published in nature.
