The first skeleton fossil of the hominid "Aldis" was unearthed in Ethiopia on 1992. This creature belongs to the ancestor of the earth ape and lived 4.4 million years ago. Paleontologists believe that "Aldis" is not the last common ancestor of humans and chimpanzees, but it is the closest primitive human to this common ancestor so far.
By analyzing Aldis's skull, teeth, pelvis, feet, hands and other skeletal fossils, experts confirmed that "Aldis" has mixed characteristics: both the "primitive" characteristics shared by its ancestors (such as Miocene apes more than 5 million years ago) and the "derived" characteristics shared by later primitive talents. However, many characteristics of Aldis do not appear in modern African apes.
Scientists speculate that Aldis is about 120cm tall and weighs about 50kg. Genetic analysis shows that humans and chimpanzees may have parted ways and embarked on different evolutionary paths six to seven million years ago.
"Aldis Silk" has a head and toes similar to those of apes, and it is easy to climb between trees, but her palms, wrists and pelvis show that she can walk upright with two feet; In addition, "Aldis" has many more primitive features than modern chimpanzees.
Extended data
The Aldis fossil was first discovered in Ethiopia in 1992. It took 17 years to evaluate its great significance. Scientists believe that this important discovery will help to understand the earliest stage of human evolution. Lucy lives on the African prairie, and Oldys takes her first step in the forest.
By studying Lucy's bones, scientists concluded that the last common ancestor of humans and other apes was similar to chimpanzees; However, "Aldis" does not have these characteristics.
"Aldis" can carry things when walking upright, and his ability to control objects skillfully exceeds that of chimpanzees. Aldis's feet are very stiff. Sometimes she can walk upright, but because of her flat feet, she can't go far. But she still has big toes to climb trees.
Her arms are long, but her palms are short and her fingers are very soft, which enables her to support her weight through her palms. Her maxillary teeth are shorter and thicker than those of modern people and sharper than those of chimpanzees. Scientists' analysis of her tooth glaze shows that Adi usually eats fruits, nuts and leaves.
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