i read somewhere....
on this earth...(long time ago) there is other species like human... (i dunno whether we can call it homo sapiens) and it has characteristics like human being...
but that species... they behave like animals... not human... they cannot think...like us...
Well there are a lot of fossils of proto-humans or members of our family but who were not human. To quote from Wikipedia (of course!)
Homo habilis
H. habilis lived from about 2.4 to 1.5 million years ago (MYA). H. habilis, the first species of the genus Homo, evolved in South and East Africa in the late Pliocene or early Pleistocene, 2.5–2 MYA, when it diverged from the Australopithecines. H. habilis had smaller molars and larger brains than the Australopithecines, and made tools from stone and perhaps animal bones. One of the first known hominids, it was nicknamed 'handy man' by its discoverer, Louis Leakey. Some scientists have proposed moving this species out of Homo and into Australopithecus.
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Homo rudolfensis and Homo georgicus
These are proposed species names for fossils from about 1.9-1.6 MYA, the relation of which with H. habilis is not yet clear.
* H. rudolfensis refers to a single, incomplete skull from Kenya.
* H.georgicus, from Georgia, may be an intermediate form between H. habilis and H. erectus.
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Homo ergaster and Homo erectus
The first fossils of Homo erectus were discovered by Dutch physician Eugene Dubois in 1891 on the Indonesian island of Java. He originally gave the material the name Pithecanthropus erectus based on its morphology that he considered to be intermediate between that of humans and apes.
H. erectus lived from about 1.8 MYA to 70,000 years ago. Often the early phase, from 1.8 to 1.25 MYA, is considered to be a separate species, H. ergaster, or it is seen as a subspecies of erectus, Homo erectus ergaster.
In the Early Pleistocene, 1.5–1 MYA, in Africa, Asia, and Europe, presumably, Homo habilis evolved larger brains and made more elaborate stone tools; these differences and others are sufficient for anthropologists to classify them as a new species, H. erectus. In addition H. erectus was the first human ancestor to walk truly upright. This was made possible by the evolution of locking knees and a different location of the foramen magnum (the hole in the skull where the spine enters). They may have used fire to cook their meat.
A famous example of Homo erectus is Peking Man; others were found in Asia (notably in Indonesia), Africa, and Europe. Many paleoanthropologists are now using the term Homo ergaster for the non-Asian forms of this group, and reserving H. erectus only for those fossils found in the Asian region and meeting certain skeletal and dental requirements which differ slightly from ergaster.
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Homo cepranensis and Homo antecessor
These are proposed as species that may be intermediate between H. erectus and H. heidelbergensis.
* H. cepranensis refers to a single skull cap from Italy, estimated to be about 800,000 years old.
* H. antecessor is known from fossils from Spain and England that are 800,000-500,000 years old.
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Homo heidelbergensis
H. heidelbergensis (Heidelberg Man) lived from about 800,000 to about 300,000 years ago. Also proposed as Homo sapiens heidelbergensis or Homo sapiens paleohungaricus.
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Homo neanderthalensis
H. neanderthalensis lived from about 250,000 to 30,000 years ago. Also proposed as Homo sapiens neanderthalensis: there is ongoing debate over whether the 'Neanderthal Man' was a separate species, Homo neanderthalensis, or a subspecies of H. sapiens. While the debate remains unsettled, the prevailing view of evidence, collected by examining mitochondrial DNA and Y-chromosomal DNA, currently indicates that little or no gene flow occurred between H. neanderthalensis and H. sapiens, and, therefore, the two were separate species. In 1997, Dr. Mark Stoneking, then an associate professor of anthropology at Pennsylvania State University, stated: "These results [based on mitochondrial DNA extracted from Neanderthal bone] indicate that Neanderthals did not contribute mitochondrial DNA to modern humans… Neanderthals are not our ancestors." Subsequent investigation of a second source of Neanderthal DNA confirmed these findings. However, supporters of the multiregional hypothesis point to recent studies indicating non-African nuclear DNA heritage dating to one MYA, as well as apparent hybrid fossils found in Portugal and elsewhere, in rebuttal to the prevailing view.
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Homo rhodesiensis, and the Gawis cranium
* H. rhodesiensis, estimated to be 300,000-125,000 years old, seems to be a mix of H. neanderthalensis, H. heidelbergensis, and H. sapiens: it has been assigned to each of these three species.
* In February 2006 a fossil, the Gawis cranium, was found which is suspected to be a species intermediate between H. erectus and H. sapiens. The skull from Gawis, Ethiopia, is believed to be 500,000-250,000 years old. Only summary details are known. Gawis man used tools and fire, and its facial features suggest its being an intermediate species. So far, it has not yet been named. [1]
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Homo sapiens
H. sapiens ("sapiens" means wise or intelligent) has lived from about 200 TYA to the present. Between 400,000 years ago and the second interglacial period in the Middle Pleistocene, around 250,000 years ago, the trend in cranial expansion and the elaboration of stone tool technologies developed, providing evidence for a transition from H. erectus to H. sapiens. The direct evidence suggests there was a migration of H. erectus out of Africa, then a further speciation of H. sapiens from H. erectus in Africa (there is little evidence that this speciation occurred elsewhere). Then a subsequent migration within and out of Africa eventually replaced the earlier dispersed H. erectus. However, the current evidence does not preclude multiregional speciation, either. This is a hotly debated area in paleoanthropology.
Current research establishes that human beings are highly genetically homogenous, meaning that the DNA of individual Homo sapiens is more alike than usual for most species, a result of our relatively recent evolution. Distinctive genetic characteristics have arisen however, primarily as the result of small groups of people moving into new environmental circumstances. Such small groups are initially highly inbred, allowing the relatively rapid transmission of traits favorable to the new environment. These adapted traits are a very small component of the Homo sapiens genome and include such outward "racial" characteristics as skin color and nose form in addition to internal characteristics such as the ability to breathe more efficiently in high altitudes.
However there is a lot of debate about how "human" they were. In particular there is a question about Neanderthals. They seem to have buried their dead and mourned them - grave sites have been found. But this is debateable. There is some argument about whether they could talk. They certainly lived in social groups and cared for their young and their old. There is a lot of debate about how far back members of the Homo group used fire and tools and I think it is likely to be before Neanderthals.
if the darwin theory is true... why other type of animals do not evolve... and think like the human think...
You assume we are some perfect evolutionary end goal. We are not. We are what we are. Evolution only looks for what is locally best - a better runner, a better swimmer, a better eater of bananas. It does not look to some "ideal" solution. And we are probably not that ideal anyway. So of course each and every animal evolves for the niche is it in. Why would cows evolve to be smart? They do not need it. It is no use to them. Why would they evolve to walk upright?
All animals evolve. It is just that we have evolved in a niche that rewards walking upright, having little hair and being smart.